Disabling Input for GOITEM-ERFMG in MIGO

Question

Hi SAP Experts/Guru's,
I have a requirement wherein i have to disable the goitem-erfmg (QTY in UnE) field from MIGO.
I have tried the following solutions:
1. First reolution we did was to find the user exit wherein we could change the ERFMG field but this user-exit doesnt exist for MIGO.  We were only able to use Enhancement MBCF0002 which contains the Function Module Exit EXIT_SAPMM07M_001
with INCLUDE ZXMBCU02.  Unfortunately this exit only works upon saving in MIGO.
2. We used the BADI MB_MIGO_BADI and made an implementation and used every methods to loop at every screen and test
   what screens will we disable but unfortunately we were not able to disable the goitem-erfmg screen at all.  This screen is contained in method LINE_MODIFY.
We also used the following methods:
PBO_DETAIL
PAI_DETAIL
PBO_HEADER
PAI_HEADER
Unfortunately this methods doesnt contain the ERFMG screen we needed to disable and it is only contained in LINE_MODIFY. we also used the other methods for MB_MIGO_BADI and only this five methods may prove to be useful.   Kindly help on how we can implement this certain requirement.

Answer 1

>
Neji03 wrote:
> This is my scenario,
>
>  upon entry of a PO number in MIGO, there are cases wherein we have to press the expand icon contained in GOITEM-expand in order for us to see the other material numbers associated with the already displayed material with the unedittable quantity. upon expansion we could see that the ERFMG for the sub materials are edittable and this is what we are trying to disable and what we want to happen here is that the first material displayed which contains the unedittable ERFMG field be enabled and become edittable in replacement of the disabled submaterials. i have disabled this in SHDO but unfortunately the main material which is the basis of the unit of quantity of the submaterial is also being disabled as well.
this sounds like a subcontract scenario.
In any case I do not know if you could disable this field with a exit or a BADI.
You can use user exit EXIT_SAPMM07M_001 to compare the entered quantity with the calculated quantity and then issue a message to not allow posting.
However, if a user enters a different quantity in MIGO  than the quantity that is automatically proposed, then this is certainly not because he has fun to screw up your system (as this would be a reason to be fired). I believe he does it because he has specific information. It can be that the calculated quantity is just wrong because of a wrong BOM. It can be that physically a different quantity was issued as the proposed quantity. Better ask the user why he changes the quantity instead of overacting with ABAP methods.
Even if you close the maintenance in MIGO, he is still  able to adjust the quantity in MIGO_GS and  MB04.