TAU0105E

TAU0105E  hh:mm:ss.ttt Enqueue of internal reader failed.
Explanation:
z/Server serializes the internal reader using the ENQ ZSERVER/INTRDR. When that ENQ cannot be obtained, some problem in the past prevented the ENQ from being released.
System administrator response:
Determine why the internal reader could not be enqueued. If necessary, contact Customer Care. Restart the scheduler or user server.