Hi, it seems is is a threading and locking problem and has nothing to do with the actual dicom code, i.e. Orthanc is sending the move request answer, but Ginkgo timeouts somewhere with a lock hold, and when it finally reads the answer, Orthanc already hung up.
My bad, because I tried to clean up threading. It will be fun to debug this ... On the other hand, within Debian/jessie the dicom I used survived the round-trip Ginkgo-Orthanc server without adding any bogus tag, i.e. these versions seem to be okay. Best, Gert