Monodevelop fails to open any .fs file and produces an "Object reference not set to an instance of an object" error.

[fsharp]

Monodevelop fails to open any .fs file and produces an "Object reference not set to an instance of an object" error.

[funnelweb]

Could you move to Modevelop 3.0.4.7? (though not sure that's the problem)

Do you have a version number for the FSharpBinding addin - was it the one installed from the addin repository? If you're comfortable compiling and installing from fsharpbinding/master that would be helpful.

-- ben

[Kazurik]

I'm having some trouble getting 3.0.4.7 to compile in Arch which I am still working on. Once I get that working I'll try it in there.

I was using the FSharpBinidng addin from the addin repository. When I try to compile FSharpBinding from source it fails with this error with monodevelop 3.0.3.5:
Errors:

/home/kaz/src/fsharpbinding/MonoDevelop.FSharpBinding/MonoDevelop.FSharp.fsproj (default targets) ->
/usr/lib/mono/Microsoft F#/v4.0/Microsoft.FSharp.targets (CoreCompile target) ->

    /home/kaz/src/fsharpbinding/MonoDevelop.FSharpBinding/FSharpResolverProvider.fs(199,9): error FS0016: The type 'string' does not have any proper subtypes and cannot be used as the source of a type test or runtime coercion.

     3 Warning(s)
     1 Error(s)

and then in monodevelop: 3.05 it fails with:
Errors:

/home/kaz/src/fsharpbinding/MonoDevelop.FSharpBinding/MonoDevelop.FSharp.fsproj (default targets) ->
/usr/lib/mono/Microsoft F#/v4.0/Microsoft.FSharp.targets (CoreCompile target) ->

    /home/kaz/src/fsharpbinding/MonoDevelop.FSharpBinding/Services/Parameters.fs(24,6): error FS0365: No implementation was given for 'ConfigurationParameters.HasDefineSymbol(symbol: string) : bool'
    /home/kaz/src/fsharpbinding/MonoDevelop.FSharpBinding/Services/Parameters.fs(24,6): error FS0054: This type is 'abstract' since some abstract members have not been given an implementation. If this is intentional then add the '[<AbstractClass>]' attribute to your type.

     3 Warning(s)
     2 Error(s)

I will post an update soon with my progress on getting monodevelop 3.0.4.7 to compile.

[Kazurik]

After getting 3.0.4.7 compiled I now receive the error of:
System.TypeInitializationException: An exception was thrown by the type initializer for MonoDevelop.Ide.Templates.ProjectTemplate ---> Mono.Addins.MissingDependencyException: The required addin 'MonoDevelop.SourceEditor2,3.0.4' is disabled.

when ever I try to do anything involving solutions at all in monodevelop. This is with the fsharpbindings from the repos. I will go test out the main branch now.

[funnelweb]

3.0.4.7 is the one you need to use.

If you want to use 3.0.5 then undefine the MONODEVEVLOP_HEAD code in Parameters.fs. See the discussion on the F# open source google group yesterday

Your earlier exceptions might have horked your MD setup and even basic MD components are now disabled. there should be some local setting under ~ that controls this stuff i suppose.

[funnelweb]

closing this for now.

there are updated versions of the binding in the MonoDevelop gallery for MD 3.0.3, 3.0.4 and 3.0.5. If you get this bug with any of those then pls reopen