Successful Completion

If status key 1 contains "0" to indicate the successful completion of the input-output operation, status key 2 can contain one of the following values:

"0"	(all files) No further information is available
"2"	(indexed files only) Indicates one of two possibilities: For a READ statement, the key value for the current key of reference is equal to the value of the same key in the next record within the current key of reference. For a WRITE or REWRITE statement, the record just written created a duplicate key value for at least one alternate record key for which duplicates are allowed.
"4"	(all files) Indicates that the length of the record being processed does not conform to the fixed file attributes for that file.
"5"	(all files) Indicates that the referenced optional file was not present at the time the OPEN statement was executed.
"7"	(record sequential files only) Indicates that for a CLOSE statement with the NO REWIND, REEL/UNIT or FOR REWIND phrase, or an OPEN statement with the NO REWIND phrase, the referenced file is a non-reel/unit medium.