Accessing MATLAB from a .NET application

I'm attempting to integrate a MATLAB .NET assembly that was supplied by a coworker into my VB.NET winforms application.

Before I even try to use the class that is in the .NET assemblies that he sent me, I needed to get the MATLAB runtime set up on my PC

• I downloaded and installed V9.3 from the Mathworks website.

• The install ran with no problems

• I have a C:\Program Files\MATLAB\MATLAB Runtime\v93 directory on my PC with a bunch of stuff in it

• I verified that my PATH environment variable includes C:\Program Files\MATLAB\MATLAB Runtime\v93\runtime\win64

• I found the MWArray.DLL where documentation saidt would be and added a reference in my application ( C:\Program Files\MATLAB\MATLAB Runtime\v93\toolbox\dotnetbuilder\bin\win64\v4.0\MWArray.dll)

But whenever I try to do the simplest thing in my application with any of the mathworks classes, I get exceptions

for example, I add the statement

dim test as new MWNumericArray()

It compiles OK, but at run-time I get an exception with 3 inner exceptions

The type initializer for 'MathWorks.MATLAB.NET.Arrays.MWNumericArray

The type initializer for 'MathWorks.MATLAB.NET.Arrays.MWArray' threw an exception

The type initializer for 'MathWorks.MATLAB.NET.Utility.MWMCR' threw an exception

An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B

Any advice on how to get started here? Is there some way to verify that my runtime is installed correctly?

Thanks in advance

• mclaus