Hi,
I tested many times.....the HU is indeed tied to a delivery (albeit a direct outbound delivery).
Can I ask what EWM release you are both running?
We are running 9.0 with support pack 5. So we wouldn't have the note mentioned by Petr.
I would expect to see the error in the foreground after this note is imported.
Many thanks for your kind assistance.
Regards
Guy