DATA FILE RECEIVING METHOD

PURPOSE:To hold a file before receiving a communication request from a host computer, and to secure the content of the file, even if write is suspended, by providing a temporary file area on a superintendent control controller. CONSTITUTION:When a data message from a host computer 1 received normally, a data is written successively in a temporary file being an arbitrary file which is set by a superintendent control controller 3. Subsequently, until reception of a final data is completed, a transfer data to which a file name is put is written in the temporary file, and thereafter, if the same file as a file name stored in the temporary file exists, it is deleted. Thereafter, the registering the temporary file as an object file, the contents of the file can be secured, even if write is suspended due to a transmission failure of a data or a transfer suspension command, etc., from the computer 1.