MATLAB: Do I receive an error about the mclmcrrt7#.dll not being found the first time I run an application generated by MATLAB Compiler 4.x (R14 and above)

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I do a new install of MATLAB and the MATLAB Compiler on my computer.

On compiling my first application and running it, I get the following error:

This application has failed to start because mclmcrrt7#.dll was not found. Re-installing the application may fix this problem.

where # is a number indicating the release since MATLAB Compiler 4.0 (R14).

Best Answer

This is an expected behavior with applications generated by the MATLAB Compiler 4.x (R14 and above).

After a new install, MATLAB updates the system path to include the path to the mclmcrrt7#.dll. However, Windows does not always properly update the path internally until after a reboot.

To work around this issue, reboot your Windows system and execute your application.

Note that this applies only to development machines with MATLAB installed. If you have deployed your application to a machine without the correct version of MATLAB installed, you must install the MATLAB Compiler Runtime as described here:

https://www.mathworks.com/help/releases/R14/toolbox/compiler/compilation_process10.html?s_tid=srchtitle

Related Solutions

MATLAB: Is it possible to deploy the compiled application in MATLAB 7.0 (R14) and install the MCRInstaller in silent mode

This enhancement has been incorporated in Release 2006b (R2006b). For more information see the Related Solution listed below.

For previous product releases, read below for any possible workarounds:

The following steps will accomplish a silent install of the MCR on a Windows deployment machine:

1. Unzip MCRInstaller.exe file in a writeable directory. This extracts the necessary files for the MCR installation. We provide a command line UNZIP utility in $MATLABROOT\toolbox\compiler\deploy\win32 for this purpose ($MATLABROOT is the root directory of your MATLAB installation). Execute the following commands in DOS:

 unzip.exe MCRInstaller.exe

This exposes the file MCRInstaller.msi, which is a standard Windows MSI package that includes the MCR archive.

2. Install the MCR with the following command:

 msiexec /q /i MCRInstaller.msi

This installs the MCR in the directory

%PROGRAMFILES%\MathWorks\MATLAB Component Runtime\vXX

The variable %PROGRAMFILES% is typically C:\Program Files by default.

XX is the MCR version.

In a similar fashion, to uninstall the MCR silently:

 msiexec /q /x d:\...\MCRInstaller.msi

For a network install of the MCR, see the Related Solution.

MATLAB: How to use both Compiler 3.x (R13) applications and Compiler 4.x (R14 and later) applications on the same machine

This enhancement has been incorporated in Release 2007a (R2007a). For previous product releases, read below for any possible workarounds:

Starting with MATLAB Compiler 4.0 (R14), the MATLAB Compiler Runtime libraries (MCR) are versioned. This allows several MCRs to be listed on the library search path and Windows registry; see the Related Solution below for more specifics.

The equivalent libraries for MATLAB Compiler 3.x (R13) are not versioned. You must therefore execute Compiler 4.x applications in one environment with only Compiler 4.x libraries on the search path, and Compiler 3.x applications in another with only Compiler 3.x libraries on the search path.

This can be simplified using Batch files on Windows, and shell scripts on Linux/UNIX/Mac. For example, if you have two applications, myR13App and myR2006bApp, you could produce the following scripts using the library paths specified in the appropriate Compiler documentation.

This procedure assumes familiarity with Batch files or shell scripts. For more information, consult your operating system documentation. The example scripts below must be configured with the appropriate paths for your Compiler versions and operating system and are not ready to execute.

For example, for 32-bit Windows:

runMyR13App.bat:

 set PATH=$MGLROOT\bin\win32;%PATH%

 C:\work\myR13App.exe

where $MGLROOT is the installation of the R13 Math and Graphics Library (MGL). Including %PATH% on the set PATH line includes the previous value of that variable.

runMyR2006bApp.bat:

 set PATH=$MCRROOT\$VERSION\runtime\win32;%PATH%
 C:\work\myR2006bApp.exe

where $MCRROOT is the installation directory of the appropriate version of the Compiler 4.x MCR, and $VERSION is the version such as v75. Including %PATH% on the set PATH line includes the previous value of that variable.

For 32-bit Linux:

runMyR13App.csh:

 #!/bin/csh
 setenv LD_LIBRARY_PATH $MGLROOT/bin/glnx86:$LD_LIBRARY_PATH
 /user/mylogin/myR13App

where $MGLROOT is the installation of the R13 Math and Graphics Library (MGL). Including $LD_LIBRARY_PATH (with an actual $) in the setenv LD_LIBRARY_PATH line includes the previous value of that variable.

runMyR2006bApp.csh:

 #!/bin/csh
 setenv LD_LIBRARY_PATH $MCRROOT/$VERSION/runtime/glnx86:$MCRROOT/$VERSION/sys/os/glnx86:$MCRROOT/$VERSION/sys/java/jre/glnx86/jre1.5.0/lib/i386/native_threads:$MCRROOT/$VERSION/sys/java/jre/glnx86/jre1.5.0/lib/i386/server:$MCRROOT/$VERSION/sys/java/jre/glnx86/jre1.5.0/lib/i386:$LD_LIBRARY_PATH
 setenv XAPPLRESDIR $MCRROOT/$VERSION/X11/app-defaults
 /user/mylogin/myR2006bApp

where $MCRROOT is the installation directory of the appropriate version of the Compiler 4.x MCR, and $VERSION is the version such as v75. Including $LD_LIBRARY_PATH (with an actual $) in the setenv LD_LIBRARY_PATH line includes the previous value of that variable.

Best Answer

Related Solutions

MATLAB: Is it possible to deploy the compiled application in MATLAB 7.0 (R14) and install the MCRInstaller in silent mode

MATLAB: How to use both Compiler 3.x (R13) applications and Compiler 4.x (R14 and later) applications on the same machine

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