Substitution Exit to update Profit Center in Billing Document
I am trying to substitute the Profit Center number while creating a Billing Document (VF01). For this I have created a Step in GGB1 under Financial Accounting --> Line Item. I have added a new step to existing substitution steps and have linked it to an EXIT.
In the Exit, I have fetched the Profit Center for the Material and the Plant from MARC and have overwritten PRCTR. The Exit is getting triggered and the value is getting overwritten but the changes are not getting reflected in the Billing Document.
Is there something I am missing? Will appreciate the suggestions.