OFS IN.MSG.RTN SUBSTITUTING PART OF THE OFS MESSAGE

Kindly guide me on how I can attach the below routine to OFS.SOURCE in IN.MSG.RTN, this is a validation to modify the DEBIT.CURRENCY if its ZiG to ZWL nad ignore if otherwise. How do I make the routine operational?

SUBROUTINE SN.FORCE.ZiG.CONVERSION.VER(OUT.MSG)
 
 INSERT I_COMMON
 INSERT I_EQUATE
 
 IF DEBIT.CURRENCY = "ZiG" THEN 
 DEBIT.CURRENCY = 'ZWL'

 RETURN
 END


 

Hi
you need to parse OFS message and substitute currency code if it matches... but much easier to do the same using AUT.NEW.CONTENT in OFS VERSION.