If your program is set to return RM/COBOL file status codes, but does not use a file status, or does not have a Declaratives section acting upon your data file, file I/O errors are reported by the run-time system. The extended file status reported may initially seem incorrect, but due to differences in the file handling of the different COBOL systems, the second byte of the reported error code needs to be converted from binary to ASCII. For example, if an error of 9/051 is reported, convert 051 to its ASCII character equivalent, which is 3 (0x33 in hexadecimal); therefore, the true RM/COBOL file status is actually 93.