TDP1891 TDPSYNC: INVALID PHASE NUMBER SYNCHRONIZING "XP"
An invalid phase number was encountered while the TDPSYNC routine was processing a Synchronize "XP" request. General Register fifteen contains the invalid number.
This condition is indicated by an abnormal termination rather than a message. It indicates an internal error in TDP.
Collect diagnostic information (including the memory dump, if any) and contact Customer Support personnel.