You get the below error messages, and believe this is caused by trying to write subsequent files to the tape with the wrong DISP parameter.
IECTMS3 5178,VVVVVV,IS NOT SCRTCH (64) IEFTMS50 7XX- 04 JOBM86LD,DSNUPROC,SYS00001,VVVVVV,00001,2C.T150452.SYSUT1IEFTMS50 ***** CA 1 ABEND,EX,04 ***** ** IEC205I SYS00003,JOBM86LD,DSNUPROC,FILESEQ=1, COMPLETE VOLUME LIST, 406 DSN=xxxxx.T150452,VOLS=VVVVVV
.......
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SYSTEM COMPLETION CODE=7F8 REASON CODE=00000004 TIME=11.05.03 SEQ=22646 CPU=0000 ASID=00E1 PSW AT TIME OF ERROR 070C1000 BCB9B5CA ILC 2 INTC 0D NO ACTIVE MODULE FOUND NAME=UNKNOWN DATA AT PSW 3CB9B5C4 - 00181610 0A0DD70F D048D048 AR/GR 0: 00000000/84000000 1: 00000000/847F8000 2: 00030003/007F8000 3: 00000000/07E74B18 4: 00000000/009AD410 5: 00000000/009FFCD8
Release : 14.0
Component : CA 1 Tape Management
The info for IECTMS3 with error code '64' shows:
"An attempt has been made to recreate a data set with DISP=NEW.You can recreate a data set only if the JCL specifies DISP=OLD or DISP=SHR."
Also, this type of processing can be controlled without using the CA1 'XITF' user exit by using the new feature "TMODBL00 Double-Open, Recreate, Mod Specification", as documented in:
TMODBL00 Double-Open, Recreate, Mod, Immutable Specification
This new feature involving the new "TMODBL00" CTAPOPTN member is delivered via CA1 PTF SO12212 in conjunction with CTS PTF SO12211 .