During a long compilation with Visual Studio 2005 (version 8.0.50727.762), I sometimes get the following error in several files in some project:
fatal erro
I had a similar problem while working on a project which I had located in my Dropbox folder. I found that it would throw this error when the little "syncing" icon was going on the Dropbox icon in the system tray, since Dropbox was accessing the files to upload them to their server. When I waited to build until Dropbox finished syncing, it worked every time.