MATLAB: Unable to start mex32 application

starting mex file

I am running a script in which i need to invoke a mexw32 file. But the following error is thrown which indicates that the application cannot start.

??? Invalid MEX-file (path of the .mexw32 file): This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.

What all will be needed to run this file? How do i reinstall the application?

Best Answer

See: http://www.mathworks.com/help/toolbox/compiler/brtm1xm-8.html:

 mclmcrrt7x.dll contains the public interface to the MCR. This library must be present on all machines that run applications generated by MATLAB Compiler. Typically, this means that either the MCR is not installed on this machine, or that the PATH does not contain the folder where this DLL is located.
 To work around this, install the MCR or modify the path appropriately. The path must contain <mcr_root>/<version>/runtime/<arch>, for example: c:\mcr\v73\runtime\win32|win64.

Or: http://www.mathworks.com/support/solutions/en/data/1-2223MW/index.html

Related Solutions

MATLAB: Do I receive an error regarding missing mclmcrrt7x.dll when I run the stand-alone application compiled with MATLAB Compiler

mclmcrrt7x.dll is a run-time library needed to run MATLAB Compiler generated applications on deployment machines that do not have MATLAB and MATLAB Compiler installed. This library is installed during the course of the MATLAB Compiler Runtime (MCR) installation.

This error typically results from one of two situations:

1. The correct version of MATLAB Compiler Runtime (MCR) is not installed.

Applications generated with MATLAB Compiler depend on the version of the run-time library specific to the version of the MATLAB Compiler that generated the application.

You can find the install program for the MCR in the following sub directory of the MATLAB installation which created the program.

 $MATLABROOT\toolbox\compiler\deploy\win32\mcrInstaller.exe

 $MATLABROOT\toolbox\compiler\deploy\win64\mcrInstaller.exe

(where $MATLABROOT is the MATLAB root directory on your machine, as returned by typing:

matlabroot

at the MATLAB command prompt.)

Instructions for installing the MCR are located in the documentation:

Deploying to End Users :: Deployment Process (MATLAB Compiler)

http://www.mathworks.com/help/compiler/deploying-to-end-users.html

Running MCRInstaller.exe on the deployment machine will install the MCR, including the mclmcrrt7x.dll:

 $MCRROOT\v$VER\runtime\win32\mclmcrrt$VER.dll

($MCRROOT is the MATLAB Compiler Runtime root directory that was chosen during the MATLAB Component Runtime installation process. This typically defaults to something like C:\Program Files\MATLAB\MATLAB Compiler Runtime. $VER is the MCR version number without the periods.)

The “missing mclmcrrt7x.dll” error message will result if you have not installed the version of the MCR that corresponds to the version of MATLAB Compiler the application was compiled with. For example, if you have installed the MCR for MATLAB Compiler 4.9 (R2008b), version 7.9 of the mclmccrt DLL will be installed in, for example:

 C:\Program Files\MATLAB\MATLAB Compiler Runtime\v79\runtime\win32\mclmcrrt79.dll.

For releases prior to R2008a the runtime libraries will be located in a slightly different directory tree:

 C:\Program Files\MATLAB\MATLAB Component Runtime\

Now, if an application generated using MATLAB Compiler 4.6 (R2007a) is executed on this computer without installing that version of the MCR, the "missing mclmcrrt76.dll" error would result.

2. A second option is that the system's PATH environment variable was not set correctly.

During the course of the MATLAB Compiler Runtime installation, the following directory should have been added to your system path:

   $MCRROOT\v$VER\runtime\win32

To work around this issue, manually update the PATH environment variable on your deployment machine to include the following directory:

   $MCRROOT\v$VER\runtime\win32

For instructions on modifying your system PATH environment variable, refer to the solution referenced below.

Also note that since these DLLs have different names for each version of the MCR, multiple versions of the MCR can be installed on the same machine.

MATLAB: Do I get the error 127 “The specified procedure could not be found” when deploying a stand-alone

This error is usually caused by using a wrong or damaged MCR installation, for example if a newer MCR version has been installed, or most probably manually copied, over an older version.

To confirm this, check that the "v7x" version number of the MCR folder matches the MCLMCRRT7x.DLL number. Here are two examples:

Wrong:

 C:\MATLAB\MCR\v74\runtime\win32\MCLMCRRT75.DLL

Right:

 C:\MATLAB\MCR\v75\runtime\win32\MCLMCRRT75.DLL

The Dependeny Walker is a good tool to debug this issue, see Related Solutions for more information.

Best Answer

Related Solutions

MATLAB: Do I receive an error regarding missing mclmcrrt7x.dll when I run the stand-alone application compiled with MATLAB Compiler

MATLAB: Do I get the error 127 “The specified procedure could not be found” when deploying a stand-alone

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