Configuration :: File Not Been Precompiled

I currently use Visual Studio 2010 and .NET Framework 4.0. I have been precompiling my site regularly for several years before uploading to our production or distribution server, using aspnet_compiler.exe, and have had no problems. When I tried to precompile and upload a few days ago, I got the following error message when I try to acccess one particular page (the rest of the site works fine):

The file '/Library/LibraryHome.aspx' has not been pre-compiled, and cannot be requested. The only significant change from the previous time I precompiled was that I had installed the AJAX Extensions and tried to use one of the controls on a page in the /Library folder (not LibraryHome.aspx but a different page). I eventually gave up on that control and removed it from the page, so there is no AJAX in the site.

I read in various forum posts regarding this error that it often occurs when one or more assemblies are missing when the site is uploaded. When I precompile, I completely empty the folder that it's going to compile into, and then when I upload the site to our production server, I delete everything in that folder also. I cannot find any assemblies that are missing. Everything in the bin folder of my local version of the site exists in the bin folder of the compiled version. I even uninstalled the AJAX Extensions, but nothing I've done removes this error message. I've checked the listing of assemblies in web.config and don't see anything it's calling for that isn't in the compiled site.