elmarco/wixl — pull request #1 by eliasp (2013-04-03 17:26:43+00:00)
Title: Improved error message for missing TARGETDIR.

If there is no node with the Id='TARGETDIR' found as common parent of all other nodes, wixl will just fail with the error "Invalid root directory" which might leave the user a bit clueless about what to do.
This should provide a bit more information to the user.