REX0072E

REX0072E  hh:mm:ss.ttt Command task is busy. Enqueue/Dequeue not possible. Please retry in a few moments.
Explanation:
The command task can only execute one command at a time. Currently it is busy for another request.
Issued by:
TAURIP14
System administrator response:
Retry the request. If the message persists, contact SupportLine.