How to check-out single file?

I was trying to use the VCS check-out rules on SVN to check out single files and I get the following error:

SVN VCS: http://prox1.mydomain.com/repos/DEV
checkout rule: +:test/trunk/test/Tools/singleSourceFile.cpp

I get the following error:

Failed to perform checkout on agent: org.tmatesoft.svn.core.SVNException: svn: Error during update from http://prox1.mydomain.com/repos/DEV/test/trunk/test/Tools/singleSourceFile.cpp to C:\TeamCity\buildAgent\work\391d5ad4716eaa55\test/trunk/test/Tools/singleSourceFile.cpp
svn: URL 'http://prox1.mydomain.com/repos/DEV/test/trunk/test/Tools/singleSourceFile.cpp' refers to a file, not a directory

The exact same thing works fine for CVS.   (We are in the process of migrating from CVS to SVN).

Please help...
-nsn