When I open the project, I am poping with an error message
"
Subversion detected a working copy that needs an explicit upgrade in 'some directory'.
While this working copy is not upgraded all files in this working copy will appear as new.
When a working copy is upgraded it can no longer be used by Subversion clients that weren't designed for this (or later) working copy formats.
Further working copy upgraded required warnings are suppressed until after you restart Visual Studio."
How to fix this problem. I am using visual studio 2012 ultimate, subversion latest, and ankh latest version.
Ankh was recently upgraded to SVN 1.8 - probably your Tortoise or Command Line svn are not yet. Update to the latest SVN version, and using that, upgrade your working copy to SVN 1.8 repo format. That'll make the message go away!