Trying to read a virtual tape, for which the NFS cache data sets have been copied from SYSA to SYSB, the job fails with
IEC149I 813-04,IFG0195H,SYSTEM4R,STEP01,TAPE,0B01,VU0017, 020
Release : 12.6
Component : CA VTAPE
The S813-04 was caused by not recalling the virtual tape successfully from NFS cache on SYSB and thus an empty tape was opened.
Be sure the tape was recalled successfully from NFS cache using SVTn START RECALL=vvvvvv