938

Explanation
The job issued an ENQ macro instruction that included
the TCB  operand. However, the TCB operand identified a task that
was in the process of ending.

System action
The system records the error in logrec data set
and issues an ABEND dump.

System programmer response
  If the problem persists, search
problem reporting data bases for a fix for the problem. If no fix
exists, contact the IBM® Support
Center. Provide the ABEND dump.

Programmer response
Determine why the task identified in the
TCB operand ended.  Correct that error and resubmit the job that caused
the abend.

Source
Global resource serialization