During the merge job the worm tapes are rejected with IOCHNBLK3 and ARCCTYPE not NULL
IEC705I TAPE ON B0BA,0TBDCW,SL,COMP,P00RZDMS,DMS.S01,CADISK.TBKPCOPY.DMSN.S2022074.T105446,MEDIA2,LOGICAL WORM
10.54.54 JOB18950 IOS000I B0DB,99,FPR,01,0600,,**,0TBDHR,P00RZDMS 629
629 80460030002A27202224(B31000011E001F00)0000(510001FF)CE1F340CFEC50B00
629 WORM OVERWRITE REJECTED
Release : 12.5
Component : Disk Backup and Restore
To correct this problem the LT06393 should be applied.
CA - Broadcom support should be contacted to obtain the test apar.