Re: GR/IR Clearing commitment item as 40 and 3

If you are using S4/HANA, then you should create a rule in FMDERIVE. Check note  2303301 - FMDERIVE - FM Derivation Tool behavior starting on EA-PS 800 for the S/4HANA for more info. Make sure that the rule is set to 'overwrite' existing value for GR/IR clearing account. Definitely don't change message behaviour: if GR/IR commitment item is not correctly selected, it might have impact on the whole FM flow.