I've succeeded in forcing the flag on in MM01 using BADI_MATERIAL_REF but this BAdI is not called if I change the flag from MM02.
Since the flag comes from MARC and not MARA, most BADIs and User-exits are of no real use.
The only other BADI that could have helped is BADI_MATERIAL_CHECK method CHECK_MASS_MARC_DATA as I could have issued an error message to prevent the user from changing it. But it's not called from MM02.
Any help or ideas will be greatly appreciated.
Thanks in advance,