FILE RELOADING SYSTEM

PURPOSE: To improve reliability for reloading processing with a data logging system concerning the file reloading system from an active file to a backup file. CONSTITUTION: Concerning the reloading processing of the active file, when data reloading is generated, reloading data (such as an address, former data or new data) are registered on logging data without fail and afterwards, the data of an active file 1 in a main memory are reloaded. Concerning the collation of a backup file 2, when there is a reloading address in the active file 1, the data comparison check of logging data in the active file 1 and the backup file 2 is performed. When the active file 1 is new data and the backup file 2 is former data, normality is decided but in the other case, abnormality is decided and when there is no reloading address, the data in the active file 1 and the backup file 2 are compared. When those data are matched, normality is judged but when they are not matched, abnormality is judged.