A member of a PDS was to be locked for exclusive access by this operation. However, the PDS member could not be locked at this time due to competion from another user. This request has already been retried several times over a three second period, and now the transaction is being aborted due to BLOCKED status. For further information on OS/390 ENQ errors, refer to the IBM publication MVS Assembler Services Reference (GC28-1910).
| RC | Description ENQ RET=USE |
|---|---|
| 04 | Resource not available |
| 08 | Task already has control of this resource |
| 12 | Task has previously failed to acquire this resource |