I have connected the second feeder system to our sandbox (running GTS 11). I have done all the up front set up with legal units, FTO's, order types, item categories, partner functions etc.
There are no incompletions but neither the SPL screening or the Embargo check is being executed, but the document does make it to GTS.
I just rechecked a document from the other logical system and that is indeed getting checked.
Suggestions?