Patent ID: 8400650

Claim:
A network printing method of restricting a host from using a network printer having a printing engine, the method comprising: if identification information of a host and a print job request signal are received from the host, receiving print data from the host and processing the received print data into a printable signal; determining whether an error exists in a print job during the processing of the print data into the printable signal by an emulator; if the error exists in the print job, determining whether a reason for the error occurrence is comprised in a list of preset use restriction conditions; and if it is determined that the reason for the error occurrence is comprised in the list of preset use restriction conditions, automatically registering the reason for the error occurrence and the identification information of the host that sends the print job request including the error in a use restriction list and stopping the print job; and if no error exists in the print job, executing the print job with respect to the print data using the printing engine unit.