Library /sys$common/syshlp/HELPLIB.HLB  —  RMU72  RMU_ERRORS, NOSIP
  transaction is not a snapshot transaction

  Explanation:  You have already started a transaction that is not
  a snapshot transaction.

  User Action:  Use COMMIT or ROLLBACK to terminate  your  current
  transaction.   Use READY BATCH RETRIEVAL to start a new snapshot
  transaction.
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