Hi guys,
Since we did a SP upgrade from 7.01 SP10 to SP11 we have troubles with our Change BAdI implementation, which we used to enable zero price PO for some catalog articles. In case an article has a zero price and comes from a catalog, we used to delete the IR_IND and GR_BASEDIV flags in the PO change BAdI when in creation mode, the PO was created and approved automatically and transferred directly to ERP. This logic worked fine until the upgrade to SP11, now the flags based on the vendor data are set after the change BAdI, so there is no way to change the flags before. The PO is in status saved because of the zero price and the corresponding IR/GR flags error.
I know there is an OSS note which describes this issue. Apparently it’s only possible to change these flags if no vendor is assigned to the item. I also searched here for some ideas on how to get this working again. But none of the threads gave helpful answers.
Is there any way to accomplish the old behavior again? I already tested some things in the check and save BAdI but nothing worked so far. Maybe one of you has a good idea 
Thanks for your help!
Best regards
Martin