Exception when initialize dll in c# generated by MATLAB Compiler

Question

I used the MATLAB Compiler to generate a .NET Assembly with a very little MATLAB code:

function output_arg = extest( input_arg1,input_arg2 )
    output_arg = input_arg1+input_arg2;
end

I generated the dll with the wizard.

Within my Visual Studio project I added the reference to the generated dll (extest.dll) and to the MATLAB Runtime dll (C:\Program Files\MATLAB\MATLAB Runtime\v92\toolbox\dotnetbuilder\bin\win64\v4.0\MWArray.dll) as mentioned in the "Assembly Description".

This is my c# code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using MathWorks.MATLAB.NET.Utility;
using extest;

namespace DllTesting
{
    class Program
    {
        static void Main(string[] args)
        {
            ExClass e1 = new ExClass();
        }
    }
}

It builds without errors an intelisense is working (so all references should be good from my understanding)

But when I launch it, the following exception gets thrown (on new ExClass()):

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

Additional information: The type initializer for 'extest.ExClass' threw an exception.

Any suggestions what is wrong with this code or whats missing?

Vahe Tshitoyan · Accepted Answer · 2017-07-13 15:53:14Z

1

Try adding this before the class definition

[assembly: MathWorks.MATLAB.NET.Utility.MWMCROption("-nojit")]

Also make sure that the .NET version you use for assembly is the same or lower than the one used for your Visual Studio project.

Another solution might be adding the path of the MATLAB runtime (e.g. C:\Program Files\MATLAB\MATLAB Runtime\v92\runtime\win64) to the PATH Environment Variable.

If none of these helps, have a look here and here, you might have a 64/32 bit mismatch.

edited Jul 13, 2017 at 15:53

answered Jun 21, 2017 at 15:39

Vahe Tshitoyan

1,4291 gold badge12 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

flor1an Over a year ago

hmm if I add the mentioned line I get the following compiler error:

Error CS1730  Assembly and module attributes must precede all other elements defined in a file except using clauses and extern alias declarations

. And it's all setted to 64bit.

flor1an Over a year ago

I just did now. No compiler error anymore. But the issue still exists. :/

Vahe Tshitoyan Over a year ago

Hmm. You might have to try different compiler options on Matlab.. I am not sure what else to recommend other than what I have already suggested..

flor1an Over a year ago

thx anyway. I managed to run it now. I compiled the code a couple of times again AND changed the .net framework to 4.0 insted of 4.6.2 (as it was default for me). As far as I understood the matlab docs it should work on 4.0 and above ... it seams not. So I'm not 100% sure if its because of the re compiling or just magic :D

Collectives™ on Stack Overflow

Exception when initialize dll in c# generated by MATLAB Compiler

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related