Sorry...Big miss on my part...
Make sure to include the OVERWRITE argument in the APPEND MEMO
This means that the "demeth.prg" (or whatever) file will need all code for the DE.

>** either way
>FOR ji = 1 TO lnFCnt
>  lcForm = ALLTRIM(laForms[ji,1])
>  WAIT WINDOW lcForm + CHR(13) + STR(ji) + " of" + STR(lnFCnt) NOWAIT
>  USE (lcForm)
>  LOCATE FOR baseclass= "dataenvironment"
>  IF FOUND()
>    ** this form has a DE
>    APPEND MEMO methods FROM demeth.prg <b>OVERWRITE</b>
>  ENDIF
>  USE
>  COMPILE FORM (lcForm)
>ENDFOR

>HTH