OPEN Error Codes

24: An FSOPEN or FSCLOSE failed and the return code is put in the Return Code field.
25: Virtual storage capacity exceeded.
28: LABELDEF information for the DCB is missing.
32: An error was detected in an IBM or ANSI label or a nonzero return code was returned from the volume switching routine.
36: OPEN processing encountered an error and the error code was put in the Return Code field. The possible error codes are the same as those returned by DMSOP036E.
39: An I/O error was encountered during tape label processing. The Return Code field will contain the I/O error code. These codes are all of the tape input and output error codes from message DMSxxx120S.
40: Open tried to process a library, but no GLOBAL command was in effect. OS simulation processing on MACLIBs, DOSLIBs, TXTLIBs, and LOADLIBs requires that a GLOBAL command be issued to define the libraries.