CPP0605019E INVALID BLKSIZE, RECFM is F .. BLKSIZE must be a MULTIPLE of the LRECL
Explanation
You specified a DCB RECFM of F, but the BLKSIZE is not a multiple of the LRECL. For RECFM=F data sets, the BLKSIZE must be a multiple of the LRECL.
System programmer response
Reset the BLKSIZE to a multiple of the LRECL.