The OMVS command could not invoke the login program that starts the z/OS UNIX shell. The attach_exec function failed with the errno and reason code displayed in the second-level TSO/E message.
The shell session is not started. If there are no other active sessions, the OMVS command ends and returns to TSO/E.
For an explanation of the errno and reason code from attach_exec, see z/OS UNIX System Services Programming: Assembler Callable Services Reference. Follow any suggested actions for this errno value and reason code.
Check that the program named in the message (the login program) exists in the file system. Make sure the program file has the proper execute permissions so this user can run it and that the permissions for the directory containing the program are set properly so this user is allowed access. Make sure that the SETUID and SETGID flags are not set for this program.
Try the OMVS command or OPEN subcommand again. If this problem persists, contact the system programmer with all information displayed in the second-level TSO/E message.