Patent ID: 7373409

Claim:
A data file transfer controlling device for controlling transfer of a data file from a data file server to a data file processing device, the data file processing device processing a data file after temporarily storing the data file in a processing storage area defined in a memory area provided in the data file processing device, the data file transfer controlling device comprising: a free space judging portion judging whether a capacity of a free space is greater than or equal to a required capacity for transfer of a data file, the free space being defined in a memory area provided in a data file processing device at a region other than a processing storage area, to which the data file is to be transferred; and a transfer controlling portion allowing the data file to be transferred from the data file server to the data file processing device when the free space judging portion determines that the free space is greater than or equal to the required capacity and failing to allow the data file to be transferred from the data file server to the data file processing device when the free space judging portion determines that the free space is less than the required capacity, wherein the data file processing device processes the data file by using the free space as a work area for processing the data file, wherein the memory area has a fixed amount of capacity, and wherein the free space judging portion determines the required capacity by calculating a sum of the size of the data file to be transferred to the processing storage area and a fixed space amount that is required to process the data file in the free space.