EXTFLD Question

D @12DBRC       E DS                  EXTNAME(BEF012)
D  FutureUseA   E                     ExtFld (RBFUTUSEA)
D   ProdPlantYN                  1    OverLay(FutureUseA:1)
D   FutureUseA2                  9    OverLay(FutureUseA:*NEXT)

We have a future use field in a file that we are going to begin to use.  I
only need to use one character of it.  Anyway, I was under the impression
that I can use FutureUseA in the program as it was RBFUTUSEA, so that when
an update was executed the RBFUTUSEA field will be changed to what was in
FutureUseA.  To break up the field, I used the Overlay for ProdPlantYN.

When the program executes, ProdPlantYN is populated to 'Y' and while in
debug mode, FutureUseA = 'Y         ', however, This value doesn't get
updated to RBFUTUSEA.  Am I suppose to move it there?  I thought the
purpose of ExtFld was to rename the field for the program?  Is there
something I'm doing wrong?

NOTE: BEF012 is defined in the FSPEC, but there is NOT a prefix on it.

Thanks in advance.

Michael Schutte