I've got a custom 'Z' field in the MARC table that I need to programatically update upon save in MM02. I've tried implementing enhancement MGA00001 but the function module exit EXIT_SAPLMGMU_001 only has CMARA in the changing parameter. I've scoured the forums for the solution but I can't find a similar post. I've seen posts that list all of the available exits and BADI's. I don't need that list again unless someone has a specific solution to my problem.
Thanks all