IDC3312I ** SYSTEM UNABLE TO OPEN

Explanation
DCBOFLG was not set after an OPEN request.

System action
The system ends the command.

System programmer response
If the error recurs and the program
is not in error, look at the messages in the job log for more information.
Search problem reporting data bases for a fix for the problem. If
no fix exists, contact the IBM® Support Center. Provide the JCL and the SYSOUT output for the job.

Programmer response
In the description of the OPEN macro instruction,
check for an explanation of failure to set the DCBOFLG field in a
non-virtual storage access method (VSAM) data control block (DCB)
after an OPEN request.

Source
DFSMSdfp

Module
IDCIO03