FCO136I message during Receive of R20 base install

Document ID : KB000074287
Last Modified Date : 11/05/2018
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Issue:
User is getting multiple FCO136I messages running job DBM20RCB to receive base install for CA DBM Solutions for DB2 for z/OS Base Install R20.
FCO136I SYSUT4 UNLOAD BLOCKSIZE INCONSISTENCY DETECTED, I/O ERRORS MAY OCCUR
Is this safe to ignore or is some correction required?
Resolution:
The message is fine. Nothing is required from the user. Message can be ignored.