We noticed an interesting yet problematic scenario. We have two sites, let's say A and B. B supplies A(mfg suggestions), and A is set up as an intersite to B(intersite suggestion). The system allows a SOF with a ship site of B for a product even though there is no record in site A. Run MRP on both sites, no errors. We only see the issue in grouping workbench when we try to firm up the the transfers in site A. Get an error there. Net problem is no supply triggers in site B until way too late. Seems like we're missing something for the system to trap that? Version 11 here. We haven't tested in version 12. We're transitioning there very soon.