14.0 DBUTLTY BACKUP SEQUENCE=PHYSICAL or EXTRACT SEQUENCE=PHYSICAL fails with CA Datacom RC 51(01)
Return Code 51 - INVALID MIX OF JOBS INCLUDING DBUTLTY FUNCTIONS
Explanation: You are attempting to execute DBUTLTY functions against areas or tables that are in use, or you are attempting to reference tables or areas that are in use by DBUTLTY functions.
If the DBUTLTY job runs other functions than this physical BACKUP / EXTRACT , functions like LOCK OPTION=MOVER as an example , check what the RMID (PTF level ) on module DBOP1PR is .
If you are running with DBOP1PR from RO79098 then apply RO79650 or higher to resolve this problem .
Title: DBUTLTY 2ND EXTRACT FAILS WITH DB01801E-INTERFACE ERROR-44
RO79650 talks about an abend or interface error but a Returncode 51(01) is possible as well .