MATLAB: Do I receive unhandled exception of type ‘System.Ty​peInitiali​zationExce​ption’ when using .Net Assembly in C# code

Question

I am following an example given on MathWorks documentation page-

https://www.mathworks.com/help/releases/R2017b/compiler_sdk/gs/create-a-cc-application-with-matlab-code-1.html

to create a .NET assembly. However, when I compile my C# code, it throws the exception:

An unhandled exception of type 'System.TypeInitializationException' occurred in MainApp.exe.

Specifically, the inner exception looks like the following:

{System.TypeInitializationException: The type initializer for 'MathWorks.MATLAB.NET.Utility.MWMCR' threw an exception. —> System.TypeInitializationException: The type initializer for 'MathWorks.MATLAB.NET.Arrays.MWArray' threw an exception. —> System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

at MathWorks.MATLAB.NET.Arrays.MWArray.mclmcrInitialize2(Int32 primaryMode)

at MathWorks.MATLAB.NET.Arrays.MWArray..cctor()

— End of inner exception stack trace —

at MathWorks.MATLAB.NET.Utility.MWMCR..cctor()

— End of inner exception stack trace —

at makesquare.MLTestClass..cctor()}

How can I resolve this?

Answer 1

The Visual Studio has to be of 64-bit to run a 64-bit DLL. By default Visual Studio is a 32-bit application and while installing it you can check the option for 'x64'.

If you have not already done so, you can go to Configuration Manager check to see which option is selected 'x64' or 'x86'. You can also change the build configuration in Visual Studio to set the Target Platform to 'x64' instead of 'x86'.