2012-12-01 03:40 AEST by Glen Starrett - There's a couple ways I've found to trigger this behavior:

1) If a user does a checkout or update using a CommitID, diff won't work.  

2) If a user uses diff -r @COMMITID (with one or two tag defs) it doesn't work
either.


cvs up -r @12a050b7d183562e
...

cvs diff -r @12e04e8e0a926f01
cvs [diff aborted]: Error writing to server WSA_INVALID_EVENT

cvs diff -r @12e04e8e0a926f01 -r @12a050b7d183562e
cvs [diff aborted]: Error writing to server WSA_INVALID_EVENT

cvs diff -r HEAD
cvs [diff aborted]: Error writing to server WSA_INVALID_EVENT

cvs diff
cvs [diff aborted]: Error writing to server WSA_INVALID_EVENT