| 摘要 |
PURPOSE:To guarantee the effective write of a final registration data even when the capacity of a memory device is filled, by preparing a dummy file in an external memory device as one of files, and guaranteeing the effective write of the final registration data by utilizing the dummy file. CONSTITUTION:The dummy file 3B separately from an ordinary data file 3A in a file system is provided in the external memory device 3. When the data is written, an error signal showing the filling of the capacity due to the fill of the capacity of the memory device is returned from an I/O managing software to an application software. The application software, when detecting the error signal, produces the write space of the data by cutting the dummy file 3B provided in the external memory device 3. The application software writes the data held in a data buffer 8 again on the storage area of the external memory device 3 generated by the cutting of the dummy file 3B.
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