The target Datareplicator receives extraction definition and update information from the source system and stores this information in an import information queue file; it stores the reception status in the import status file.

If an error occurs during reception processing, Datareplicator outputs error information to an error information file.

The target Datareplicator reads the update information in the import information queue file, issues an SQL statement for the row corresponding to the mapping key to update the target database, and stores the import status in the import status file.

If an error occurs during import processing, Datareplicator outputs the error information to an error information file. If an SQL statement results in an error at the HiRDB, Datareplicator outputs the SQL statement to an unimported information file.