Technical Solutions

Why can't I create an M-MEX DLL with the MATLAB Add-in for Visual Studio?

Date Last Modified: Friday, June 26, 2009

Solution ID:		1-18J1I
Product:		MATLAB
Platform:		Windows
Operating System:		Windows Any

 

Subject:

Why can't I create an M-MEX DLL with the MATLAB Add-in for Visual Studio?

Problem Description:

I get the following (or similar) errors when I try to create a MEX function from an M-file in the Visual MATLAB add-in for Microsoft Visual Studio (MSVC) using the M-MEX DLL Application type.
Linking...
LINK : error LNK2001: unresolved external symbol mexFunction
test1.lib : fatal error LNK1120: 1 unresolved externals
LINK : fatal error LNK1141: failure during build of exports file
Error executing link.exe.

Solution: This is a bug in the MATLAB Add-in for Visual Studio in MATLAB 6.0 (R12) that has been fixed in MATLAB 6.1 (R12.1). If you are still using MATLAB 6.0 (R12), the following workaround can be used: 1. Open your project in MSVC 2. Right click on your project 3. Go to 'Settings' 4. Go to the 'Linking' tab 5. Go to 'Category:' choose 'Input' 6. Under 'Project Options:' change 'export:mexFunction' to 'export:mexLibrary' 7. Click OK Now you should be able to compile and link your project, and successfully call the DLL from MATLAB.

Please provide feedback to help us improve this Solution