I have a solution file that the the Version utility will not upgrade. It says 'Uh oh'..looks like we found something during our analysis that would prevent us from upgrading the solution.Here is what we found".

There is nothing in the box....

The log file shows the following 

11:06:58: Gathering volume and assembly information.

11:06:01: Data at the root level is invalid. Line 1, position 1.

11:06:01:    at System.Xml.XmlTextReaderImpl.Throw(Exception e)

   at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)

   at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()

   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()

   at System.Xml.XmlTextReaderImpl.Read()

   at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)

   at System.Xml.XmlDocument.Load(XmlReader reader)

   at System.Xml.XmlDocument.Load(String filename)

   at Infragistics.VersionUtilitySupport.Core.File.Types.ProjectFile..ctor(String path, FileBase owner)

   at Infragistics.VersionUtilitySupport.Core.File.Types.SolutionFile.Analyze()