I recently started using Transmission on Synology DS411 II in collaboration with Flexget. I get the torrents via Torrenday. Everything works fine, just the download and upload in Transmission starts not automatic. The error I get is unregistered torrent pass. If i upload the torrent files manually in Transmission everything works well.
Does anyone know what I'm doing wrong?
You've probably gotten a torrent that has a long list of trackers, and the torrent's no longer registered on one of those trackers.
The error message probably doesn't do any harm as long as there are other working trackers on the list. To "fix" the error, remove the unhappy tracker from the torrent's tracker list.