The block length is not the same as in the BDW. The block length is nn1 and the length in the BDW is nn2.
A length of the block found on the log was not the same as the length in the block descriptor word (BDW). The length of the block is nn1. The length in the BDW is nn2. The log being processed either is not produced by CICS®, or is a CICS log that is corrupted.
CICS VR archive stops.
Specify the correct log, and rerun the archive.