Problem with first revision of file being checked in, then deployed

  I'm automating the deployment of our software, and came across a problem.

In order to only pull the files changed for a specific revision, I do a
"diff -r<PriorRev>:<CurrRev> --summarize". I then parse the output
through sed to get just the filename.

All this works normally, but if the PriorRev of the file doesn't exist
(it was added in the CurrRev revision), it gives me an error (below) and
doesn't return anything. My question is, is there anything I can do
besides having to parse the output from the command for that error
message? I don't want to have to pull ALL the files in revision CurrRev,
because some of these are SQL scripts and can't be re-run again, if they
were from a prior revision.

svn: Unable to find repository location for
'https://subversion.assemb<snip>' in revision 40851

-- 
"Dingo" Dave Bartmess
Broomfield, CO. USA
http://edingo.net