Hi, It would be helpful to see the jcl and job log. I suggest using REGION=0M in the job card. Also, I had success with using the below to backup my ENDEVOR files...much faster and more flexible:
//ENDRBKUP JOB (24186),'BKUP END',CLASS=P,MSGCLASS=O,
// MSGLEVEL=(1,1),REGION=0M,USER=I07XX00
//* RUN DAILY AT 2000 (8:00PM) ??
//MYLIB JCLLIB ORDER=PGMR.PROCLIB
//STEP010 EXEC PGM=ADRDSSU
//SYSPRINT DD SYSOUT=*
//*APE1 DD DSN=GRT.GIOIDXM.AP.END.TEST.BACKUP, FOR TESTING
//TAPE1 DD DSN=DRGDGT.GIOIDXM.AP.END.DAILY.BACKUP(+1), MAKE GD 7
// DISP=(,CATLG,KEEP),
// LABEL=EXPDT=98014,
// UNIT=TAPE
//SYSIN DD *
DUMP DATASET( -
INCLUDE ( -
SYEND1.ACMROOT, -
SYEND1.ACMXREF, -
SYEND1.PACKAGE, -
SYEND1.*.MCF, -
GRP.AP.END**, -
GRQ.AP.END**, -
GRT.AP.END**, -
GRU.AP.END**)) -
OUTDDNAME (TAPE1) -
OPTIMIZE(4) -
TOL(ENQF)
/*