Dear Prakash,
Thanks for suggestion. I have already tried this exit. But when a material is getting created based on a reference material, I am not getting that reference material in this exit. My requirement is if the batch-management is already ticked, user, who doesn't have the authorization, shouldn't able to change it. That is why I need a point either where the change in MARC-XCHPF is getting reflected, or I am getting the reference material.
Kindly suggest.