Using MWArray in .NET 6 Application throws exception

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Philipp Gun
Philipp Gun 2022-11-18
In my .NET 6 WPF Application i try to reference the MWArray.dll provided by Mathworks to access a dll i build with the MATLAB2022b Library compiler.
Path of MWArray.dll: C:\Program Files\MATLAB\R2022b\toolbox\dotnetbuilder\bin\win64\netstandard2.0\MWArray.dll
When trying to instanciate my dll:
this.matLibrary = new MatLabInterface.MatlabLibrary();
the application crashes with the following error message:
System.TypeInitializationException: The type initializer for 'MatLabInterface.MatlabLibrary' threw an exception.
---> System.TypeInitializationException: The type initializer for 'MathWorks.MATLAB.NET.Utility.MWMCR' threw an exception.
---> System.TypeLoadException: Could not load type 'System.Web.UI.WebResourceAttribute' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
at System.ModuleHandle.ResolveType(QCallModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type)
at System.ModuleHandle.ResolveTypeHandle(Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(MetadataToken caCtorToken, MetadataImport& scope, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder`1& derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctorWithParameters, Boolean& isVarArg)
at System.Reflection.CustomAttribute.AddCustomAttributes(ListBuilder`1& attributes, RuntimeModule decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder`1 derivedAttributes)
at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType)
at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
at System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit)
at System.Attribute.GetCustomAttributes(Assembly element, Type attributeType, Boolean inherit)
at System.Attribute.GetCustomAttribute(Assembly element, Type attributeType, Boolean inherit)
at System.Attribute.GetCustomAttribute(Assembly element, Type attributeType)
at MathWorks.MATLAB.NET.Utility.MWMCR..cctor()
--- End of inner exception stack trace ---
at MatLabInterface.MatlabLibrary..cctor()
--- End of inner exception stack trace ---
at MatLabInterface.MatlabLibrary..ctor()
Has anyone ever experienced the same issue?
As a note: This Dll worked with my Framework 4.7.0 Version of the same program. I´m currently trying to migrate to .NET6
I already tried the v4.0 MWArray too.
What I also tried or did was to enable the Flag in the MatLab Library compiler to compile the DLL for .NET 5.0 MATLAB Library Compiler Options

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