DBUTLTY LOAD with the following statement...
LOAD DBID=123,DDNAME=ABC123,FORMAT=format,OPTIMIZE=YES,
SORT=1000000,TABLE=ABC,AREA=ABC
fails with
DB13018E - OPEN ERROR, RETURN CODE 63 (63)
. . .
DB00501E - OPEN ERROR - RETURN CODE 63 (063) CXX=cxx (ABC123 )
DB10045E - ABNORMAL TERMINATION DUE TO ERROR(S)
z/OS
The Datacom RC 63(063) occurs because the DDNAME used for the backup file (i.e., ABC123) matches the format of Datacom area (ABC) and DBID (123) names so Datacom is trying to access it as the actual database area rather than as the input to the LOAD.
Use another DDNAME in the LOAD card , one that does not match the format of an AREA/DBID combination.
For DBUTLTY LOAD documentation , see LOAD (Build a Data Area).