Could Not open the requested SVN filesystem

The error:
svn: PROPFIND request failed on '/svnrep/trunk/21003301'
Svn: "Could Not open the requested SVN filesystem"
 
... is return on the screen and in my httpd log whenever I attempt to
check out a file using:
 
"svn checkout http://svnrepository.testdomain/svnrep/trunk/21003301
project"
 
... from the server When I use "svn checkout file:///...." followed by
the absolute path name, (again from the server) the checkout performs
normally. Naturally, being able to use a url, checking out via a client
is out of the question.
 
I have loaded the dav modules in httpd.conf and included the following
location xml:
 
<Location /svnrep>
DAV svn
SVNPath /var/svnrepository/trunk
</Location>
 
My repository is located in /var/svnrepository.
 
I cannot find any documentation on this error. Has anybody see it
before?
 
Mike Cooper