I am trying to RECEIVE Common Services and getting a IGW01513T message for relfiles CW11000.F3 and CW41100.F4. What could be the problem?

Document ID : KB000055875
Last Modified Date : 14/02/2018
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We suspect you are reporting something similar to the following symptoms...

GIM35101E ** SYSMOD CW11000 FAILED BECAUSE OF AN ERROR THAT OCCURRED
             WHILE LOAD ING SMPTLIB DATASET
IEB1013I COPYING FROM PDSU  INDD=SMPPTFIN VOL=W03000 DSN=CAI.CW11000.F3
IEB1014I           TO PDSE OUTDD=SMPTLIB  VOL=SSYS04 DSN=SSWCSYS.CCS30.CW11000.F3
IGW01513T RECFM INCOMPATIBLE -- INPUT RECFM = U  OUTPUT  RECFM = FB

If this is the case, then your problem is likely associated with how your DFSMS ACS routines are defined. Please refer to IBM document BDC000021715 for details. As a circumvention, you can pre-allocate the associated relfiles with attributes:
DSORG=PO RECFM=U LRECL=0 BLKSIZE=6144 DSNTYPE=LIBRARY