Did you 'upgrade' the project? You kinda need different .fsproj files for 2008 and 2010.
To get better diagnostics, it is often useful to run "msbuild.exe whatever.fsproj" from the command-line (using either a VS2008 or VS2010 command prompt to run that version of msbuild, or else explicitly calling out the path, e.g. "c:\Windows\Microsoft.NET\Framework\v3.5\MSBuild.exe").
Did you 'upgrade' the project? You kinda need different .fsproj files for 2008 and 2010.
No, just opening and building using VS2008.
To get better diagnostics, it is often useful to run "msbuild.exe
whatever.fsproj"
OK, using MSBuild in the VS2008 bin reports, "The F#-compiled DLL 'c:\Program Files\Reference Assemblies\Microsoft\F#\1.0\Runtime\v2.0\FSharp.Core.dll' needs to be recompiled to be used with this version of F#"
Seems like the newer compiler is running while referencing the older dlls?
It sounds like maybe your CTP does not match your VS Beta. You should have, e.g. the October2009 CTP for VS2008, and VS2010 Beta2. It sounds like maybe you have an earlier CTP? What versions of F# appear under 'Program Files'?
Well, shoot, I thought I had the latest CTP, but I didn't. That fixed it. Sorry.
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I have a small project that built fine before installing VS2010. Now it just reports, "Build failed" with no errors. I would just use 2010 and not worry about 2008 except that I'm planning on doing a presentation to a small group in a lab environment where I can only be assured that VS2008 is installed.
Any ideas how to fix 2008?