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It produces empty mse file while parsing sln project [1].
command:
c:\Roslyn2Famix>c:\Roslyn2Famix\RoslynMonoFamix.exe C:\Users\vaidas\Documents\Template_NOF9\Template.sln C:\Users\vaidas\Documents\Template_NOF9\out4.mse
produces:
Current executable location c:\Roslyn2Famix\RoslynMonoFamix.exe
resulting out4.mse file contains '()'

[1] https://github.com/NakedObjectsGroup/NakedObjectsFramework/blob/master/Template_NOF9/Template_NOF9.zip?raw=true

After generating an MSE-File from a very large C# Solution (3+ million code lines) I get endless Messages from Moose:

I also reported it once via Report-button.

Please let me know how can I give you some more usable infos.

For example a class should not have the list of methods. This is because each method already knows it's class.

Any intention to build support for .NET Core 3.1+, or .NET 5+ projects?

This is likely a bug in the roslyn-analyzer code. Stack trace:

Unhandled Exception: System.InvalidCastException: Unable to cast object of type 'FAMIX.ParameterizedType' to type 'FAMIX.Class'.
at ASTVisitor.VisitThrowStatement(ThrowStatementSyntax node)
at Microsoft.CodeAnalysis.CSharp.Syntax.ThrowStatementSyntax.Accept(CSharpSyntaxVisitor visitor)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.DefaultVisit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitBlock(BlockSyntax node)
at Microsoft.CodeAnalysis.CSharp.Syntax.BlockSyntax.Accept(CSharpSyntaxVisitor visitor)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.DefaultVisit(SyntaxNode node)
at ASTVisitor.VisitMethodDeclaration(MethodDeclarationSyntax node)
at Microsoft.CodeAnalysis.CSharp.Syntax.MethodDeclarationSyntax.Accept(CSharpSyntaxVisitor visitor)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.DefaultVisit(SyntaxNode node)
at ASTVisitor.VisitClassDeclaration(ClassDeclarationSyntax node)
at Microsoft.CodeAnalysis.CSharp.Syntax.ClassDeclarationSyntax.Accept(CSharpSyntaxVisitor visitor)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.DefaultVisit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitNamespaceDeclaration(NamespaceDeclarationSyntax node)
at Microsoft.CodeAnalysis.CSharp.Syntax.NamespaceDeclarationSyntax.Accept(CSharpSyntaxVisitor visitor)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.DefaultVisit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor.VisitCompilationUnit(CompilationUnitSyntax node)
at Microsoft.CodeAnalysis.CSharp.Syntax.CompilationUnitSyntax.Accept(CSharpSyntaxVisitor visitor)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxWalker.Visit(SyntaxNode node)
at RoslynMonoFamix.MainClass.Main(String[] args)

Unfortunately I don't have a minimal example where does it crash, as the tool doesn't give any info on what class did it fail.