Using the 32-bit matlab api with a 64-bit installation

Hi all,

I am currently building a 32-bit MatLab application in c++ using the MatLab library. It has to be compiled to 32 bit since some of the other libraries I use are only available in 32-bit. However, my current MatLab installation is 32-bit. I do have the 32-bit libs and dll's, and I was able setup Visual Studio to use those, so the application can be compiled without errors, and the application is launched correctly. I can start the matlab engine from my program, however the 64-bit matlab.exe executable is launched instead of the 32-bit one. As a result my program crashes the second I do anything with the engine. Is it possible to force the 32-bit executable to be used instead of the 64-bit one?

Side node: I also noticed that when I start the 32-bit executable manually I get an error that the jvm can't be started because the classpath can't be found.

Answer 1

[Kaustubha Govind]

It seems likely that your 64-bit MATLAB is registered as a COM server, but your 32-bit installation isn't. You could try manually registering your 32-bit installation as a COM server and see if that will override the 64-bit installation.

   matlab /regserver