We include our AI project files as Solution Items in a Visual Studio 2010 Solution folder.
When AI creates a .back.aip file, the aip file (sometimes) disappears from the Solution folder. We have to manually add it again.
Visual Studio has the same issue with Word and Excel files.
The problems occurs because Visual Studio monitors the existence of files in Solution folders.
Probably due to the way the backup file is created, the aip file does not exist during a very short time and Visual Studio removes it from the Solution folder.
Maybe you could rethink the way you create the .back.aip file, to prevent the aip file getting removed from the Visual Studio Solution folder.
Ref.: http://stackoverflow.com/questions/5469 ... -in-vs2010