cvs add/commit failure

[H Brydon]

I am attempting to commit some files on my gps and I get the following cvs 
error:


F:\Garmin\GPX\Archive>cvs commit -m "20121002 vista"
cvs commit: Examining .
? Auto 20-MAY-12 06.39.29 PM.gpx
? Auto 20-JUL-12 09.50.03.gpx
[snip...]
? Auto 01-AUG-12 08.27.23.gpx
cvs: ../../../src/hash.c:353: findnode: Assertion `key != ((void *)0)' 
failed.
cvs [commit aborted]: received abort signal

F:\Garmin\GPX\Archive>

It doesn't do the obvious right thing.  I previously did a "cvs add *.gpx" 
which also seems to be ignored.  Any ideas?

My environment is:

F:\Garmin\GPX\Archive>cvs version
Client: Concurrent Versions System (CVS) 1.12.12 (client)
Server: Concurrent Versions System (CVS) 1.12.13-MirDebian-8 (client/server)