Sorry for the delay.
I cleared all the log files, restarted Sonnar and tried again.
things started hanging. Sonnar just didn’t recover at all and had to be restarted.
one NzbDone process would not die (signal 9 from root wouldn’t kill it).
I tried to restart the machine (via ssh) but it won’t even shutdown…
I’ll try when i get home…
Incidentally:
the log file had no mention of the transfer attempt.
I had a partial~ file in the destination directory, which seemed to be the right size.