2010 version of TF (TFS command tool) unable to determine the workspace that is working with Vs 2012 and TFS 2012

We upgraded to VS 2012 and TFS 2012 a month ago.
I have a backupShelve.cmd that used to work before upgrade, but when I run it yesterday caused the error
Unable to determine the workspace. You may be able to correct this by running ‘tf workspaces /collection:TeamProjectCollectionUrl’
The backupShelve.cmd file is the following 
call “C:Program Files (x86)Microsoft Visual Studio 10.0VCvcvarsall.bat” x86
tf shelve   /replace /comment:”Current backup” CurrentBackupMT01 /noprompt
After some time I’ve noticed, that batch file refers to version 10 folder instead of “Microsoft Visual Studio 11”.
After I’ve changed folder name, TF started to work.