Error 0204 may happen:
-When the VLS is not large enough.
-When a VLS FORMAT (prior the RESTORE) was not done.
-When there is prior error(JCL) in previous steps.
-When the VLSUTIL data set name is incorrect or corrupted.
204 I-O ERROR LIBRARY CONTROL BLOCK. BLOCK NBR IS nnnnn. RUN CANCELLED. ERROR CODE IS 204
Explanation: (This abend was issued from VLSUTIL, the VLS Batch Utility under MVS, VSE, or CMS.)
An attempt to read a block from a library file produced a read error. This error occurs for functions other than a file format.
User Response: Resubmit the job. If this abend recurs, ask your Site Administrator to format and restore the library from a backup file.