* 00 Successful completion - no error occurred
* 02 Duplicate alternate record key (when WITH DUPLICATES) is not specified
04 Successful read, but length of record does not conform to FD entry
* 10 Sequential read attempted, but there are no more input records
* 21 Keys are not in correct sequence
* 22 Attempt to write a record, which will create a duplicate primary record key
* 23 Required record not found during a READ
* 24 Attempt to write beyond the pre-established boundaries of an indexed file
* 30 Permanent data error has occurred (hardware problem)
34 Boundary error for a sequential file
37 Permanent error has occurred because an OPEN statement has been attempted on a file that will not support the mode specified in the OPEN statement.
41 An OPEN statement has been attempted on a file that is already open.
42 A CLOSE statement has been attempted on a file that has not been opened
* 43 An attempt has been made to DELETE or REWRITE a record after an unsuccessful READ