hangs during netsync

I did a netsync with an explicit --db= and a --set-default, because the 
database had moved in the file tree.

It hung after telling me there were no revs out, which was probably 
correct; I think the two databses may well have been previously sync'd. 

hendrik@notlookedfor:~/dv/lang/algol/a68h2/workspace$ mtn sync 
--db=/home/hendrik/dv/lang/algol/a68h2/a68h.mtn --set-default
mtn: warning: could not unregister workspace from old database 
'/home/hendrik/dv/lang/a68h2/a68h.mtn'
mtn: connecting to 'mtn://a68h.mtn-host.prjek.net'
mtn:   include pattern  '*'
mtn:   exclude pattern  ''
mtn: finding items to synchronize:
mtn: certificates | keys | revisions
mtn:          369 |    2 |       123
mtn:  bytes in | bytes out | revs in | revs out
mtn:     1.0 k |     1.4 k |       0 |        0

Of course it also told me it could not unregister my workspace from the 
old database, which is probably because the database wasn't there any 
more.  It had been moved, along with the source tree, several 
workspaces, and several other projects, to a new location.

Are the databases still OK?

-- hendrik