Running Matlab Code from dot net

Question

I've compiled a little program using matlab 2013 I can see in my dll: Test.TestMethods all my functions

I've added it as a reference to my dot net project, and added the MWArray dll from matlab bin\win64\v2.0 folder.

** Update: The app crushes at this line in the matlabe generated code:

mcr= new MWMCR("", ctfFilePath, embeddedCtfStream, true);

If I embed the ctf file - it will crush, if I don't embed it, it will throw an exception.

I've set my program to build against X64.

Once I try to create the object:

Test.TestMethods test = new Test.TestMethods();

My App crashes. I can only see in external Visual Studio instance:

Unhandled exception at 0x0000000001D36E60 (m_interpreter.dll). 
Access violation reading location 0x00000000A5CE3920.

I have no idea where to start....

EDIT1: this is the ctor (there is also a static cctor):

    .method public hidebysig specialname rtspecialname 
        instance void  .ctor() cil managed
{
  // Code size       20 (0x14)
  .maxstack  8
  IL_0000:  ldarg.0
  IL_0001:  call       instance void [mscorlib]System.Object::.ctor()
  IL_0006:  ldsfld     class [mscorlib]System.Exception Test.TestMethods::ex_
  IL_000b:  brfalse.s  IL_0013
  IL_000d:  ldsfld     class [mscorlib]System.Exception Test.TestMethods::ex_
  IL_0012:  throw
  IL_0013:  ret
} // end of method TestMethods::.ctor

Your question is a little vague. What is Test.TestMethods? Is MWArray a managed dll or native? How are you calling into MWArray? Can you post the code from TestMethodss' constructor? — Tejas Sharma
– Tejas Sharma, Commented Jun 20, 2013 at 17:21
this is a generated function by the matlab compiler. I can try to ildisasmble it.. — Dani
– Dani, Commented Jun 20, 2013 at 17:26
Hmm well just make sure you've copied over ALL dependencies into your current working directory (eg. MWArray might have a dependency on one of the other dlls present in the matlab folder). Try copying over all the dlls and see if that makes a difference. — Tejas Sharma
– Tejas Sharma, Commented Jun 20, 2013 at 17:29
<offtopic>Have you tried ilnumerics.net? I never touched the whole Matlab compiler thing again and use only pure managed code since then. little reason to continue to torture yourself ... just my 2C</offtopic> — user492238
– user492238, Commented Jun 20, 2013 at 17:48

Konstantin Tarkus · Accepted Answer · 2013-07-09 05:33:14Z

1

You cannot call MATLAB generated .NET libraries from .NET 4.5 assemblies, also it crashes when VS debugger is attached.

answered Jul 9, 2013 at 5:33

Konstantin Tarkus

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1 Comment

Rajaraman Subramanian Over a year ago

My application is targeted for .NET framework v4.6.1 and it crashes exactly at the point where a new object for the class exported by MATLAB, is instantiated. Once I moved down to .NET framework v4.0, it worked.

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