Hi Vinita/Konstantin,
I have checked we have implemented BBP_SRC_DETERMINE, however it is not triggered during the Search. We have not implemented the other two BADI's mentioned.
The Source Release Indicator is 'X' for the Purchase requisition we wanted to search. The issue is when the search is done by Puchasing Group. If the search is done by External requirement i get it.
Thanks for sending FAQ notes.