The operating system or access method encountered an error during the open process. Subcode1 indicates why the file could not be opened. Subcode2, if not zero, indicates the return code ( in hexadecimal ) given by the operating system or access method. Subcode2 information is mainly used by IBM® support when diagnosing problems. The meaning of the Subcode1 values are as follows:

• 50 - A non-existent ISAM file is being opened for input.
• 51 - An unexpected error occurred when opening an ISAM file. Subcode2 gives the return code from ISAM.
• 52, 53 - An unexpected error occurred when opening a native or REGIONAL(1) file.
• 54 - A non-existent BTRIEVE file is being opened for input.
• 55 - An unexpected error occurred when opening a BTRIEVE file. Subcode2 gives the return code from BTRIEVE.
• 56 - An unexpected error occurred when opening a DDM file.
• 57,58 - An unexpected error occurred when opening a DDM sequential, DDM relative or DDM indexed file. Subcode2 gives the return code from DDM.
• 59 - An attempt was made to open a file that was already open.
• 60 - A file of invalid type is being opened. An example of this is opening a VSAM file under UNIX System Services. VSAM files are not supported under UNIX System Services.
• 66 - Open of a VSAM file failed. Subcode2 gives the feedback code.

The ONCODE associated with this message is 93.