I want to validate some fields in OBBH transaction, at prerequisition stage. Here only BKPF and BSEG tables are there. But I need to validate some other tables fields like sub PL group, customer group, distribution channel etc. Here I do not find user exit to add as it is available at substitutions stage. The exits at prerequisition stage not user defined, needs access key.
I try to find any user exit in FB01 transaction to validate these prerequisite, but all the exists are related to IDOCS etc and not relevant to this.
Can any one please suggest me to solve this issue.
Thanks & Regards