Abstract:
A print management apparatus is provided. A print history of a print job data is stored into a first storage component, when a print data identifier of the print job data containing print data, a print data identifier, and a printing parameter is not stored in the first storage component. A printing parameter in the first storage component served as alert information is stored into a second storage component as an alert history, when the print data identifier of the print job data is stored in the first storage component, and a printing parameter stored in the first storage component is not the same as a printing parameter of the print job data. Whether continuing a print or aborting a print is selected, when the print data identifier of the print job data is stored in the second storage component.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2009-064785 filed Mar. 17, 2009. 
       BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to a storage medium storing a print management program, a print management apparatus, and a printer system. 
         [0004]    2. Related Art 
         [0005]    Conventionally, there have been known a print control apparatus that prevents repetitive print failures and a print control system that copes with cases where printing is aborted. 
       SUMMARY 
       [0006]    According to an aspect of the invention, there is provided a print management apparatus that includes: a first storage component that stores a print history associated with a print data identifier for identifying print data and a printing parameter to be used to perform printing based on the print data; a second storage component that stores an alert history associated with the print data identifier and alert information; a first control component that performs a control operation to store the print history of the print job data into the first storage component, when the print data identifier of the print job data containing the print data, the print data identifier, and the printing parameter is not stored in the first storage component; a second control component that performs a control operation to store an alert history including a printing parameter stored as alert information in the first storage component into the second storage component, when the print data identifier of the print job data is stored in the first storage component, and a printing parameter stored in the first storage component is not the same as a printing parameter of the print job data; a select component that prompts a user to select a print continue command or a print abort command, when the print data identifier of the print job data is stored in the second storage component; and a print control component that controls the printing, based on the select result of the select component. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    Exemplary embodiments of the present invention will be described in detail based on the following figures, wherein: 
           [0008]      FIG. 1  is a block diagram showing an example of a main portion structure of the electrical system of a printer system in accordance with a first exemplary embodiment of the invention; 
           [0009]      FIG. 2  is a schematic view showing an example of the entire operation flow of the printer system in accordance with the first exemplary embodiment of the invention; 
           [0010]      FIG. 3  is a flowchart showing an example of the processing flow of a computer in the printer system in accordance with the first exemplary embodiment of the invention; 
           [0011]      FIG. 4  is a flowchart showing an example of the processing flow of the printer server in the printer system in accordance with the first exemplary embodiment of the invention; 
           [0012]      FIG. 5  is a flowchart showing an example of the processing flow of the print history storing process in the printer system in accordance with the first exemplary embodiment of the invention; 
           [0013]      FIG. 6  is a block diagram showing an example of a main portion structure of the electrical system of a printer system in accordance with a second exemplary embodiment of the invention; 
           [0014]      FIG. 7  is a flowchart showing an example of the processing flow of a computer in the printer system in accordance with the second exemplary embodiment of the invention; 
           [0015]      FIG. 8  is a flowchart showing an example of the processing flow of the printer in the printer system in accordance with the second exemplary embodiment of the invention; 
           [0016]      FIG. 9  is a flowchart showing an example of the processing flow of a computer in a printer system in accordance with a third exemplary embodiment of the invention; 
           [0017]      FIG. 10  is a flowchart showing an example of the processing flow of the printer server in a printer system in accordance with a fourth exemplary embodiment of the invention; 
           [0018]      FIG. 11  is a flowchart showing an example of the processing flow of the printer server in a printer system in accordance with a fifth exemplary embodiment of the invention; 
           [0019]      FIG. 12  is a flowchart showing an example of the processing flow of the printer server in a printer system in accordance with a sixth exemplary embodiment of the invention; and 
           [0020]      FIG. 13  is a flowchart showing an example of the processing flow of the print history storing process in the printer system in accordance with the sixth exemplary embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0021]    The following is a description of exemplary embodiments of the present invention, with reference to the accompanying drawings. 
         [0022]      FIG. 1  is a block diagram showing an example of a main portion structure of the electrical system of a printer system  10  in accordance with a first exemplary embodiment. 
         [0023]    As shown in  FIG. 1 , the printer system  10  includes computers  12  that transmit print job data, a printer server  14  that manages an image forming operation based on the transmitted print job data, and a printer  16  that performs the image forming operation based on the print job data. 
         [0024]    Each computer  12  includes a CPU (Central Processing Unit)  18  that performs various kinds of control operations, a ROM  20  that stores various kinds of control programs to be executed by the CPU  18  and stores various kinds of data, a RAM (Random Access Memory)  22  that is temporarily used as the work storage area in various operations, a driver  23  that performs data and command reading/writing on a storage medium such as a CD-ROM, an OS (Operating System), a printer driver that sets the various functions of the printer  16 , a storage device  24  that stores various application programs, and a keyboard and a mouse. The computer  12  also includes a network interface  32  that is connected to an input device  26  that inputs various kinds of information such as a print continue command and a print abort command, a display device  28  that displays various kinds of information such as an alert dialog, and a network  30 . When communications with the printer server  14  and the printer  16  are performed via the network  30 , the network interface  32  exchanges various kinds of information with the printer server  14  and the printer  16 . Those components of the computer  12  are electrically connected via a system bus  34 . 
         [0025]    The printer server  14  includes a CPU  36  that performs various kinds of control operations, a ROM  38  that stores various kinds of control programs to be executed by the CPU  36  and various kinds of data, a RAM  40  that is temporarily used as the work storage area in various kinds of operations, a driver  42  that performs data and command reading/writing on a storage medium such as a CD-ROM, a storage device  44  that stores the later described print history table, the later described print failure table, and the likes, and a network interface  46  that is connected to the network  30  and exchanges various kinds of information with the computer  12  and the printer  16  when communications with the computer  12  and the printer  16  are performed via the network  30 . Those components of the printer server  14  are electrically connected via a system bus  48 . 
         [0026]    The printer  16  includes a CPU  50  that performs various kinds of control operations, a ROM  52  that stores various kinds of control programs to be executed by the CPU  50  and various kinds of data, a RAM  54  that is temporarily used as the work storage area in various kinds of operations, a driver  56  that performs data and command reading/writing on a storage medium such as a memory card, a printer engine  57  that forms an image on a recording medium based on print job data designating a print job, a storage device  58  that stores a device controller for controlling the operation of the printer engine  57 , a display panel  60  that displays various kinds of information, and a network interface  62  that is connected to the network  30  and exchanges various kinds of information with the computer  12  and the printer server  14  when communications with the computer  12  and the printer server  14  are performed via the network  30 . Those components of the printer  16  are electrically connected via a system bus  64 . 
         [0027]    The later described processing routine program illustrated in  FIG. 3  is stored in the ROM  20  as the storage medium of the computer  12 , and the later described processing routine program illustrated in  FIGS. 4 and 5  is stored in the ROM  38  as the storage medium of the printer server  14 . 
         [0028]    Referring now to  FIG. 2 , an example of the processing flow in the printer system  10  of this exemplary embodiment is briefly described through an example case where a user  1  and a user  2  perform printing operations with the use of the printer system  10  in accordance with this exemplary embodiment. 
         [0029]    First, the user  1  transmits a print command from the computer  12 A to the printer server  14  to collectively print a 2-page ledger sheet A onto one paper sheet (hereinafter referred to as “2UP”printing). In this case, the printer server  14  performs print control on the printer  16 , and the printer  16  performs 2UP printing with the use of the data of the ledger sheet A. 
         [0030]    After performing the 2UP print command on the computer  12 A, the same user  1  transmits a 1UP print command to print the same ledger sheet A, or transmits a print command to print the same ledger sheet A with a different parameter. In such a case, the printer server  14  receives the 1UP print command to print the ledger sheet A. Having received the print command to print the same ledger sheet A with a different number of UP sheets, the printer server  14  determines that the previously transmitted 2UP print command to print the ledger sheet A is a wrong print command, and stores the data indicating the wrong print command into the print failure table. The printer server  14  then performs print control on the printer  16  to perform 1UP printing. When print commands with different parameters are issued for the same ledger sheet as described above, the printer server  14  determines that the former print command is a wrong print command, since there is a high probability that the latter print command is the command to correct the former print command that is a wrong command. 
         [0031]    Under the print control of the printer server  14  based on the latter print command, the printer  16  performs 1UP printing. In this manner, 2UP printing and 1UP printing are both performed for the ledger sheet A, and the data indicating that the 2UP print command is a wrong print command is stored into the print failure table. 
         [0032]    The other user  2  next transmits a print command from the computer  12 B to the printer server  14  to perform 2UP printing for the same ledger sheet A. Since a print command to perform 2UP printing for the ledger sheet A is stored as a wrong print command in the print failure table, the print server  14  transmits a message to the effect that there is a possibility of a wrong print command to the computer  12 B, and displays this message on the display device  28 . In this manner, the printer server  14  prompts the user  2  to select either a print continue command or a print abort command. The printer server  14  then performs print control, according to the selected command. 
         [0033]    The operation of the printer system  10  is now described in greater detail. 
         [0034]    Referring now to  FIG. 3 , an example of the processing flow according to the computer processing program to be executed by the CPU  18  of the computer  12  is described. 
         [0035]    In step  100 , a check is made to determine whether a print command containing user ID has been received from an application. When such a print command has been received, print data and the parameter for performing printing based on the print data (hereinafter referred to as the printing parameter) are obtained from the application in step  102 . 
         [0036]    When such a print command is determined not to have been received in step  100 , the operation is put into a stand-by state until a print command is received. 
         [0037]    In step  104 , a print data identifier for identifying the print data obtained in step S 102  is attached to the user ID obtained in step  100  and the print data and the printing parameter obtained in step  102 . In this manner, print job data is generated. 
         [0038]    In step  106 , the print job data generated in step  104  is transmitted to the printer server  14 . 
         [0039]    In step  108 , a check is made to determine whether the later described alert message has been received from the printer server  14 . When the alert message has been received, a failed print alert dialog is displayed on the display device  28  in step  110 . 
         [0040]    When the alert message is determined not to have been received in step  108 , a check is made to determine whether a predetermined period of time has passed in step  112 . When the predetermined period of time has passed, the CPU  18  determines that there is no alert history in the print failure history table of the printer server  14 , and ends the operation. When the predetermined period of time has not passed yet, the CPU  18  determines that an alert history is still being searched for in the print failure history table of the printer server  14 , and the operation returns to step  108 . 
         [0041]    The display device  28  displays an alert message such as “there is a possibility of wrong print! Please check the following setting: 2UP assignment”, a print command button, and an alert dialog showing a return button (see  FIG. 2 ). In step  114 , a check is made to determine whether a print continue command has been input by the user pressing the print button. When the print continue command has been input, the print continue command is transmitted to printer server  14  in step  116 , and the operation comes to an end. 
         [0042]    When the print continue command is determined not to have been received in step  114 , the operation moves on to step  118 , and a check is made to determine whether a print abort command has been input by the user pressing the return button. When the print abort command has been input, the print abort command is transmitted to the printer server  14  in step S 120 , and the operation comes to an end. When the print abort command has not been input, the operation returns to step  114 , and the determining procedures of steps  114  through  118  are repeated until one of the commands is input. 
         [0043]    Referring now to  FIG. 4 , an example of the processing flow according to the printer server processing program to be executed by the CPU  36  of the printer server  14  is described. 
         [0044]    In step  200 , a check is made to determine whether print job data has been received from the computer  12 . When print job data has not been received, the CPU  36  stands by until print job data is transmitted. 
         [0045]    When print job data has been received, the print failure table is searched for the alert information (alert history) corresponding to the print data identifier and the printing parameter contained in the print job data received from the computer  12  in the step  202 . 
         [0046]    In the print failure table, the print data identifiers (such as “DI ledger sheet 01.pdf” and “report material.doc”) are associated with printing parameters (such as “document orientation: vertical”, and “N-UP number: 2”), and printing parameters that differ between previously received print job data and later received print job data are stored as the alert information, as shown in Table 1. In the example shown in Table 1, while the number of N-UP as the printing parameters of the former received print job data is 2, the number of N-UP as the printing parameter of the latter received print job data is 1. Accordingly, “N-UP number: 2” is stored as the alert information, as the command to perform 2UP printing is determined to be a wrong print command. 
         [0000]    
       
         
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                 print data identifier 
                 printing parameter 
                 alert information 
               
               
                   
               
             
             
               
                 DI ledger sheet 
                 document orientation: vertical 
                 N-Up number: 2 
               
               
                 01.pdf 
                 N-Up number: 2 
               
               
                   
                 two-side printing: No 
               
               
                   
                 margin: regular 
               
               
                   
                 color mode: auto 
               
               
                   
                 quality: high precision 
               
               
                   
                 . . . 
               
               
                 report material.doc 
                 document orientation: horizontal 
                 document 
               
               
                   
                 N-Up number: 2 
                 orientation: 
               
               
                   
                 two-side printing: Yes 
                 horizontal 
               
               
                   
                 margin: regular 
               
               
                   
                 color mode: full-color 
               
               
                   
                 quality: high precision 
               
               
                   
                 . . . 
               
               
                   
               
             
          
         
       
     
         [0047]    In step  204 , a check is made to determine whether the alert history has been searched from the print failure table in step  202 . When the alert history has not been searched, a print history storing process (described later) is carried out in step  212 . 
         [0048]    When the alert history has been searched, the alert history is obtained from the print failure table in step  206 . 
         [0049]    In step  208 , an alert message to that effect that there is a possibility of a print failure is transmitted to the computer  12 . 
         [0050]    A print continue command or a print abort command is transmitted from the computer according to the alert message. In step  210 , a check is made to determine whether a print continue command has been received from the computer  12 . When a print continue command has been received, a print history storing process (described later) is carried out in step  212 . Print control is then performed on the printer  16  in step  216 , and the operation comes to an end. 
         [0051]    When a print continue command has not been received in step  210 , a check is made to determine whether a print abort command has been received from the computer  12  in step  214 . When a print abort command has been received, the operation comes to an end. When a print abort command has not been received in step  214 , the operation returns to step  210 , and the determining procedures of steps  214  and  210  are repeated until either of the two commands is input. 
         [0052]    Referring now to  FIG. 5 , an example of the print history storing process carried out to store a history into the print history table and the print failure table in step  212  is described. 
         [0053]    In step  300 , the print history table shown in Table 2 is searched for the print history having the user ID and the print data identifier contained in print job data received from the computer  12 . In the print history table, user IDs for identifying users, the times at which print job data are received, print data identifiers, and printing parameters contained in the print job data are associated with one another and are stored. 
         [0000]    
       
         
               
               
               
               
             
           
               
                 TABLE 2 
               
               
                   
               
               
                 user ID 
                 time 
                 print data identifier 
                 printing parameter 
               
               
                   
               
             
             
               
                 fx0519 
                 2008/12/08-11:56:04 
                 DI ledger sheet 01.pdf 
                 document orientation: vertical 
               
               
                   
                   
                   
                 N-Up number: 2 
               
               
                   
                   
                   
                 two-side printing: No 
               
               
                   
                   
                   
                 margin: regular 
               
               
                   
                   
                   
                 color mode: auto 
               
               
                   
                   
                   
                 quality: high precision 
               
               
                   
                   
                   
                 . . . 
               
               
                 fx0519 
                 2008/12/08-11:59:16 
                 DI ledger sheet 01.pdf 
                 document orientation: vertical 
               
               
                   
                   
                   
                 N-Up number: 1 
               
               
                   
                   
                   
                 two-side printing: No 
               
               
                   
                   
                   
                 margin: regular 
               
               
                   
                   
                   
                 color mode: auto 
               
               
                   
                   
                   
                 quality: high precision 
               
               
                   
                   
                   
                 . . . 
               
               
                 ff1999 
                 2008/12/08-12:01:22 
                 ′07 report material.doc 
                 document orientation: horizontal 
               
               
                   
                   
                   
                 N-Up number: 2 
               
               
                   
                   
                   
                 two-side printing: Yes 
               
               
                   
                   
                   
                 margin: regular 
               
               
                   
                   
                   
                 color mode: full-color 
               
               
                   
                   
                   
                 quality: high precision 
               
               
                   
                   
                   
                 . . . 
               
               
                 fy3908 
                 2008/12/08-12:08:34 
                 presentation to 
                 document orientation: horizontal 
               
               
                   
                   
                 client.ppt 
                 N-Up number: 1 
               
               
                   
                   
                   
                 two-side printing: Yes 
               
               
                   
                   
                   
                 margin: regular 
               
               
                   
                   
                   
                 color mode: monochrome 
               
               
                   
                   
                   
                 quality: regular 
               
               
                   
                   
                   
                 . . . 
               
               
                 ff1999 
                 2008/12/08-12:09:41 
                 ′07 report material.doc 
                 document orientation: vertical 
               
               
                   
                   
                   
                 N-Up number: 2 
               
               
                   
                   
                   
                 two-side printing: Yes 
               
               
                   
                   
                   
                 margin: regular 
               
               
                   
                   
                   
                 color mode: full-color 
               
               
                   
                   
                   
                 quality: high precision 
               
               
                   
                   
                   
                 . . . 
               
               
                   
               
             
          
         
       
     
         [0054]    In step  302 , a check is made to determine whether the print history searched for in step  300  exists in the print history table. When the print history does not exist, the user ID, the reception time, the print data identifier, and the printing parameter of the print job data received from the computer  12  are associated with one another and are stored into the print history table in step  314 . 
         [0055]    When the print history exists in step  302 , the print history is obtained from the print history table in step  304 . 
         [0056]    When two or more print commands are issued for the same print job within a predetermined period of time, there is a high probability that the two or more print commands are issued within the predetermined period of time because the previous print command is inappropriate. When only one print command is issued for one print job within the predetermined period of time, there is a high probability that the one print command is appropriate. Accordingly, in step  306 , a check is made to determine whether the received print job data is a print history stored into the print history table within the predetermined period of time, based on the time data in the print history obtained in step  304 . When the reception time of the print job data is a predetermined amount of time or more past the previous reception time, the print command is determined to be an appropriate print command. The operation then moves on to step  314 , and the data is stored into the print history table as described above. 
         [0057]    When the print history obtained in step  304  is determined to be a print history stored into the print history table within the predetermined period of time since the reception of the print job data in step  306 , the print command might be an inappropriate print command (a wrong print command). Therefore, the operation moves on to step  308 . 
         [0058]    In step  308 , a check is made to determine whether the printing parameters contained in the print job data received from the computer  12  differ from the printing parameters contained in the print history obtained in step  304 . When the printing parameters are the same, the print commands are determined to be appropriate print commands, though two or more print commands are issued for the print job within the predetermined period of time. The printing parameters contained in the print history obtained in step  304  are also determined to be appropriate printing parameters. The operation then moves on to step  314 . 
         [0059]    When the printing parameters contained in the print job data received from the computer  12  in step  308  are determined to differ from the printing parameters contained in the print history obtained in step  304 , the printing parameters contained in the print history obtained in step  304  are determined to be inappropriate parameters. In step  310 , the difference between the printing parameters contained in the print job data received from the computer  12  and the printing parameters contained in the print history obtained in step  304  is computed. 
         [0060]    In step  312 , the print data identifier and the printing parameters of the print history obtained from the print history table in step  304 , and the printing parameters that differ from the printing parameters of the print history and have already been stored in the print history table (the printing parameters of the print job data previously designated by a print command) are stored as alert information into the print failure table, with the alert information being associated with the print data identifier. 
         [0061]    In step  314 , the time of reception from the computer  12 , the printing parameters of the received print job data, and the likes are associated with the print data identifier, and are stored into the print history table. 
         [0062]    Through the above operation, failure information is shared among network users, and printing is performed with printing parameters suitable for each document. 
         [0063]    Next, a second exemplary embodiment is described. In the second exemplary embodiment, the storage device that is provided in the printer server to store the print history table and the print failure table in the first exemplary embodiment is provided in a printer, and the print history is managed in the printer. In  FIGS. 6 through 8 , the same components as those of the first exemplary embodiment are denoted by the same reference numerals as those used in the first exemplary embodiment, and explanation of them is omitted herein. 
         [0064]    As shown in  FIG. 6 , a printer system  10  in accordance with this exemplary embodiment includes a computer  12  and a printer  16 . 
         [0065]    The device controller that controls the operation of a printer engine  57 , and the print history table and the print failure table described in the first exemplary embodiment are stored in a storage device  52  in the printer  16 . 
         [0066]    The later described processing routine illustrated in  FIG. 7  is stored in a ROM  20  serving as the storage medium of the computer  12 , and the later described processing routine illustrated in  FIG. 8  is stored in a ROM  52  serving as the storage medium of the printer  16 . 
         [0067]    Next, the operation of the printer system  10  is described in greater detail. 
         [0068]    Referring now to  FIG. 7 , a processing flow according to the computer processing program to be executed by the CPU  18  of the computer  12  is described. The differences between the second exemplary embodiment and the first exemplary embodiment include the following aspects: print jobs that are transmitted to the printer server in the first exemplary embodiment are transmitted to the printer in the second exemplary embodiment; alert messages that are received from the printer server in the first exemplary embodiment are received from the printer in the second exemplary embodiment; and print continue commands and print abort commands that are transmitted to the printer server in the first exemplary embodiment are transmitted to the printer in the second exemplary embodiment. 
         [0069]    Accordingly, in step  106  of  FIG. 7 , print job data is transmitted to the printer. In step  108 , a check is made to determine whether an alert message transmitted from the printer has been received. In step  116 , a print continue command is transmitted to the printer. In step  120 , a print abort command is transmitted to the printer. 
         [0070]    Referring now to  FIG. 8 , the processing flow according to the printer processing program to be executed by the CPU  50  of the printer  16  is described. The differences between the second exemplary embodiment and the first exemplary embodiment include the following aspect: while the printer server performs print control on the printer to process print job data received from the computer in the first exemplary embodiment, the printer performs printing based on print job data received from the computer in the second exemplary embodiment. 
         [0071]    Accordingly, in step  216  of  FIG. 8 , printing is performed based on print job data received from the computer. 
         [0072]    Referring now to  FIG. 9 , a third exemplary embodiment is described. In the third exemplary embodiment, the storage device that is provided in the printer server to store the print history table and the print failure table in the first exemplary embodiment is provided in a computer, and the print history is managed in the computer. In  FIG. 9 , the same components as those of the first exemplary embodiment are denoted by the same reference numerals as those used in the first exemplary embodiment, and explanation of them is omitted herein. 
         [0073]    The printer system in accordance with this exemplary embodiment includes the same computer and the same printer as those of the second exemplary embodiment. 
         [0074]    The printer driver for setting various functions of the OS and the printer, various application programs, the print history table and the print failure table described in the first exemplary embodiment, and the likes are stored in the storage device in the computer. 
         [0075]    The following processing routine illustrated in  FIG. 9  is stored in a ROM serving as the storage medium of the computer. Referring to  FIG. 9 , the processing flow according to the computer processing program to be executed by the CPU of the computer is described. The differences between the third exemplary embodiment and the first exemplary embodiment include the following aspects: the alert history search performed by the printer server based on print job data received from the computer in the first exemplary embodiment is performed by the computer in the third exemplary embodiment; the check made by the printer server to determine whether the alert history is searched in the print failure table in the first exemplary embodiment is made by the computer in the third exemplary embodiment; the obtaining of the searched alert history performed by the printer server in the first exemplary embodiment is performed by the computer in the third exemplary embodiment; the print history storing process performed by the printer server in the first exemplary embodiment is performed by the computer in the third exemplary embodiment; and the print control performed by the printer server on the printer in the first exemplary embodiment is performed by the computer in the third exemplary embodiment. 
         [0076]    Accordingly, in step  202  of  FIG. 9 , the print failure table stored in the storage device in the printer is searched for the alert information (the alert history) corresponding to the print data identifier and the printing parameters obtained from an application. In step  204 , a check is made to determine whether the alert history has been searched in step  202 . When the alert history is determined not to have been searched in step  204 , the alert history storing process is carried out in step  212 . When the alert history is determined to have been searched in step  204 , the alert history is obtained from the print failure table in step  206 . When a print continue command is detected in step  114 , the alert history storing process is carried out in step  212 , and print control is performed on the printer in step  216 . 
         [0077]    Next, a fourth exemplary embodiment is described. In the fourth exemplary embodiment, a check is made by the printer server to determine whether information set as select unnecessary information is contained in print job data received from the computer. In  FIG. 10 , the same components as those of the first exemplary embodiment are denoted by the same reference numerals as those used in the first exemplary embodiment, and explanation of them is omitted herein. 
         [0078]    The structure of the printer system  10  in accordance with this exemplary embodiment is the same as the structure of the first exemplary embodiment, and therefore, explanation of the structure of the printer system  10  is omitted herein. 
         [0079]    Next, the operation of the printer system  10  is described in detail. 
         [0080]    The procedures according to the computer processing program to be executed by the CPU  18  of the computer  12  are the same as those of the first exemplary embodiment, and therefore, explanation of them is omitted herein. 
         [0081]    Referring now to  FIG. 10 , the processing flow according to the printer server processing program to be executed by the CPU  36  of the printer server  14  is described. The differences between the fourth exemplary embodiment and the first exemplary embodiment include the following aspects: when print job data has not been received, a check is made to determine whether the print data identifier or the user ID is to be set as the select unnecessary information or the application name is set as the select unnecessary information; when the print data identifier or the user ID is to be set as the select unnecessary information or the application name is to be set as the select unnecessary information, the print data identifier or the user ID is set as the select unnecessary information, or the application name is set as the select unnecessary information; and, when the print data identifier, the user ID, or the application name is not to be set as the select unnecessary information, a check is made to determine whether a preset print data identifier or a preset user ID is contained beforehand as the select unnecessary information in the print job data received from the computer, or a preset application name is newly attached to the print job data received from the computer. 
         [0082]    Accordingly, in step  504  of  FIG. 10 , a check is made to determine whether the print job data received from the computer contains the print data identifier, the user ID, or the application name that is preset in step  502 . When the print job data contains the preset print data identifier, the preset user ID, or the preset application name, the print data identifier often changes the print parameter such as text data, the print command from the user does not require an alert to the effect that there is a possibility of failed printing, or it is unnecessary to display alert information, or the print command from the application is for a batch operation that is hindered by a stop of the processing. Therefore, an alert message is unnecessary, and the operation moves on to step  212 . When the print job data does not contain the preset print data identifier or the preset user ID, or when the preset application name is not newly attached to the print job data, the operation moves on to step  202 . 
         [0083]    This exemplary embodiment may be applied to the second exemplary embodiment and the third exemplary embodiment. 
         [0084]    When this exemplary embodiment is applied to the third exemplary embodiment, if a print command is not obtained in step  100  of the third exemplary embodiment, a check is made to determine whether the print data identifier, the user ID, or the application name is to be set as the select unnecessary information in step  500 . When the print data identifier, the user ID, or the application name is to be set as the select unnecessary information, the print data identifier, the user ID, or the application name is set in step  502 , and the operation returns to step  100 . When the print data identifier, the user ID, or the application name is not to be set in step  500 , the operation returns to step  100 . When a print command is obtained in step  100 , the print data identifier for identifying the print data is attached to the print data and the printing parameters, so as to generate print job data in step  104 . After the print job data is generated in step  104 , a check is made to determine whether the file name or the user ID set beforehand in step  502  or the application name set beforehand in step  502  is newly added to the print job data in step  504 . 
         [0085]    Next, a fifth exemplary embodiment is described. In the fifth exemplary embodiment, the printer server determines whether the alert history searched from the print failure table contains information that is set beforehand as the select unnecessary information. In  FIG. 11 , the same components as those of the first exemplary embodiment are denoted by the same reference numerals as those used in the first exemplary embodiment, and explanation of them is omitted herein. 
         [0086]    In the printer system  10  in accordance with this exemplary embodiment, a print failure table that stores alert information associated with user IDs, print data identifiers, and printing parameters as shown in Table  3  is used in place of the print failure table stored in the storage device  44  of the first exemplary embodiment. 
         [0000]    
       
         
               
               
               
               
             
           
               
                 TABLE 3 
               
               
                   
               
               
                 user ID 
                 print data identifier 
                 printing parameter 
                 alert information 
               
               
                   
               
             
             
               
                 fx0519 
                 DI ledger sheet 
                 document orientation: 
                 N-Up number: 2 
               
               
                   
                 01.pdf 
                 vertical 
               
               
                   
                   
                 N-Up number: 2 
               
               
                   
                   
                 two-side printing: No 
               
               
                   
                   
                 margin: regular 
               
               
                   
                   
                 color mode: auto 
               
               
                   
                   
                 quality: high precision 
               
               
                   
                   
                 . . . 
               
               
                 ff1999 
                 report material.doc 
                 document orientation: 
                 document 
               
               
                   
                   
                 horizontal 
                 orientation: 
               
               
                   
                   
                 N-Up number: 2 
                 horizontal 
               
               
                   
                   
                 two-side printing: Yes 
               
               
                   
                   
                 margin: regular 
               
               
                   
                   
                 color mode: full-color 
               
               
                   
                   
                 quality: high precision 
               
               
                   
                   
                 . . . 
               
               
                   
               
             
          
         
       
     
         [0087]    Next, the operation of the printer system  10  in accordance with the fifth exemplary embodiment is described in detail. 
         [0088]    The operation according to the computer processing program to be executed by the CPU  18  of the computer  12  is the same as that of the first exemplary embodiment, and therefore, explanation of the operation is omitted herein. 
         [0089]    Referring now to  FIG. 11 , the processing flow according to the printer server processing program to be executed by the CPU  36  of the printer server  14  is described. The differences between the fifth exemplary embodiment and the first exemplary embodiment include the following aspects: a check is made to determine whether the user ID is to be set as the select unnecessary information, and when the user ID is to be set as the select unnecessary information, the user ID is set as the select unnecessary information; and, when the user ID is not to be set as the select unnecessary information, a check is made to determine whether a preset user ID is contained as the preset information in the searched alert history. 
         [0090]    Accordingly, in step  604  of  FIG. 11 , a check is made to determine whether the print job data received from the computer  12  contains the user ID that is set beforehand in step  602 . When the print job data contains the preset user ID, the alert history containing the preset user ID is not used. Therefore, the operation moves on to step  212 . When the print job data does not contains the preset user ID, the operation moves on to step  206 . 
         [0091]    In this exemplary embodiment, the procedure to determine whether the print job data received from the computer  12  contains the preset user ID in step  604  is applied to the first exemplary embodiment. However, this procedure may also be carried out in any of the second through fourth exemplary embodiments. 
         [0092]    Next, a sixth exemplary embodiment is described. In the sixth exemplary embodiment, the printer server determines whether the print history searched from the print history table contains information that is set beforehand as the select unnecessary information. In  FIGS. 12 and 13 , the same components as those of the first exemplary embodiment are denoted by the same reference numerals as those used in the first exemplary embodiment, and explanation of them is omitted herein. 
         [0093]    The structure of the printer system  10  in accordance with this exemplary embodiment is the same as that of the first exemplary embodiment, and therefore, explanation of the structure is omitted herein. 
         [0094]    Next, the operation of the printer system  10  in accordance with the sixth exemplary embodiment is described in detail. 
         [0095]    The operation according to the computer processing program to be executed by the CPU  18  of the computer  12  is the same as that of the first exemplary embodiment, and therefore, explanation of the operation is omitted herein. 
         [0096]    Referring now to  FIG. 12 , an example of the processing flow according to the printer server processing program to be executed by the CPU  36  of the printer server  14  is described. The differences between the sixth exemplary embodiment and the first exemplary embodiment include the following aspect: a check is made to determine whether the user ID is to be set as the select unnecessary information, and, when the user ID is to be set as the select unnecessary information, a user ID setting process is carried out. 
         [0097]    Accordingly, in  FIG. 12 , when print job data has not been received from the computer  12  in step  200 , a check is made to determine whether the user ID is to be set in step  700 . When the user ID is to be set, the user ID setting process is carried out in step  702 , and the operation returns to step  200 . When the user ID is not to be set in step  700 , the operation returns to step  200 . When print job data has been received from the computer  12  in step  200 , the operation moves on to step  202 . 
         [0098]    Referring now to  FIG. 13 , an example of the processing flow according to the print history storing program to be executed by the CPU  36  of the printer server  14  is described. The differences between the sixth exemplary embodiment and the first exemplary embodiment include the following aspect: a check is made to determine whether the print history searched from the print history table contains a preset user ID that is set as predetermined information. 
         [0099]    Accordingly, in step  704  of  FIG. 13 , a check is made to determine whether the print history searched from the print history table in step  300  contains the user ID that is set beforehand in step  702 . When the print history contains the preset user ID, the print job data of the preset user ID is not stored into the alert history, and the operation moves on to step  314 . When the print history contains the preset user ID, the operation moves on to step  304 . 
         [0100]    In this exemplary embodiment, a check is made to determine whether the preset user ID is contained. However, an IP address or a MAC address may be set, and a check may be made to determine whether the preset IP address or the preset MAC address is newly added to print job data received from the computer. When the preset IP address or the preset MAC address is contained, the alert history is not stored into the print failure table. 
         [0101]    In this exemplary embodiment, the procedure to determine whether the preset user ID is contained in step  704  is applied to the first exemplary embodiment. However, this procedure may also be carried out in any of the second through fifth exemplary embodiments. 
         [0102]    By carrying out the above procedures, the print job data of a user that does not benefit from print failure information is not stored as print failure information. 
         [0103]    In each of the first through sixth exemplary embodiments, the use of the print failure information that has been stored over a predetermined period of time among the print failure information stored in the print failure table may be prohibited. 
         [0104]    In each of the first through sixth exemplary embodiments, after the differences between the printing parameters contained in print job data received from the computer  12  and the printing parameters contained in the print history are computed, a check may be made to determine whether the number of different parameters is a predetermined number or less. When the number of different parameters is the predetermined number or less, an alert history may be stored into the print failure table. 
         [0105]    In each of the first through sixth exemplary embodiments, the program for performing the operation of the computer, the program for performing the operation of the printer server, the program for performing the print history storing process, and the program for performing the operation of the printer are stored in a ROM in advance. However, the invention is not limited to that arrangement, and those programs may be stored in a computer-readable recording medium such as a CD-ROM, a MD, a MO, a DVD-ROM, a flexible disk, a memory card, or a DAT. 
         [0106]    In each of the first through sixth exemplary embodiments, a dialog is displayed on the display device, so as to prompt a user to select a print continue command or a print abort command. However, a user may be prompted to select a print continue command or a print abort command through voice guidance or the like, and print control may be performed according to the selected command. 
         [0107]    In each of the first through sixth exemplary embodiments, when there is a difference between printing parameters, the print command is determined to be a wrong print command if print job data is again received within a predetermined period of time since the print job data is received last time. However, if print job data is again received within a predetermined period of time since the print job data is received last time, the print command may be determined to be a wrong print command.