MATLAB: Do I receive a linker error when compiling a DLL using MATLAB Builder EX 1.2.14 (R2009b)

1104compiledllerrorlinklinkerlnkMATLAB Builder EX

When I attempt to compile my DLL using MATLAB Builder EX, I receive the following at the end of my compilation:

 LINK : fatal error LNK1104: cannot open file 'C:\DOCUME~1\my_1_0.dll' failed.

Best Answer

The linker error message indicates that the DLL cannot be opened. It is likely that this DLL is currently referenced or used in an application (i.e. Excel). Please shut down all applications that are currently using the DLL and recompile.

Related Solutions

MATLAB: I have two versions of MATLAB installed on the computer, why am I unable to use MATLAB Builder EX with one version and not the other

This automation error is caused due to the system environment variable setting for the PATH variable.

When a file or collection of files is compiled in MATLAB using 'deploytool', the version of MATLAB that you are compiling the application on must be before all other versions of MATLAB in the system path. Otherwise, the application will try to look for the wrong libraries when it is running the deployed application and this may result in errors.

Specifically, this error was caused because an incorrect version of mbuild was being used during compilation. This causes the Builder EX generated COM dll to link against a different mclmcrrt7x.dll. Installing MATLAB 7.8 (R2009a) adds $MATLABROOT9a/bin on the path ahead of the MATLAB 7.6 (R2008a) path and since mbuild.bat resides in $MATLABROOT/bin folder, the MATLAB 7.8 (R2009a) mbuild is called by mcc.

To workaround this issue, please enter the following command at the MATLAB command prompt:

setenv('PATH',(matlabroot) '\bin;' getenv('PATH'))

Verify that this worked by using the following command:

getenv('PATH')

You should see $MATLABROOT_8a/bin first on the path.

Some important caveats to note:

1.) You must exit out of ALL Microsoft applications before the path updates will take effect. This includes Microsoft Outlook, Word, Power Point, Excel, etc.

2.) You must restart MATLAB and recompile your application after this is done. Double check that your path settings are correct by typing "getenv('path')" at the MATLAB command prompt in order to ensure that the path is in the correct order.

Please refer to the Related Solution below to check how to change your System PATH.

MATLAB: Do I receive a LINK error when I use the MEX command in MATLAB 7.7 (R2008b)

In this particular case, the value of the environment variables TEMP and TMP on the user's machine was set to:

 TEMP=C:\DOCUME~1\WEBERJE\LOCAL SETTINGS\TEMP
 TMP=C:\DOCUME~1\WEBERJE\LOCAL SETTINGS\TEMP

There is a 'space' character between the words 'Local' and 'Settings' and thus the name 'Local Settings' was not returned in a shortened format by the machine to the compiler. So, the temporary directory where the linker was apparently looking for the required libraries was:

'C:\DOCUME~1\WEBERJE\LOCAL'

instead of:

'C:\DOCUME~1\WEBERJE\LOCAL SETTINGS'

This explains the error message that was generated when running the MEX command:

 LINK : fatal error LNK1104: cannot open file 'C:\DOCUME~1\WEBERJE\LOCAL'

To workaround this issue, change the environment variables TEMP and TMP to some directory that does not contain spaces. For example, set the TEMP and TMP environment variables to:

 C:\TEMP

NOTE: Ensure that such a directory exists and has write permissions for all users who are running the MEX command.

Best Answer

Related Solutions

MATLAB: I have two versions of MATLAB installed on the computer, why am I unable to use MATLAB Builder EX with one version and not the other

MATLAB: Do I receive a LINK error when I use the MEX command in MATLAB 7.7 (R2008b)

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