HELPLIB.HLB  —  RMU72  COSI_ERRORS, CVTUNGRANT
  cannot convert an ungranted lock

  Explanation:  An attempt was made to convert a lock that is  not
  granted.   (Only  locks  that  are  granted  can be converted to
  another lock mode.)

  User Action:  This error message indicates a possible  error  in
  the    locking   protocols.    Contact   your   Oracle   support
  representative for assistance.
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