Why do I get License Manager Error -3 when I try to use the MATLAB Compiler?

ERROR: ??? Error: Could not check out a Compiler license:
No server for this feature (-3,121:2) No such file or directory.

Error in ==> D:\MATLABR11\toolbox\compiler\mcc.dll

Answer 1

[MathWorks Support Team]

This error occurs when the LM_LICENSE_FILE variable in Windows is not set properly during installation. To remedy this, set the variable to point to your license file using the following steps under Windows NT/2000 (for Windows 95 or 98, you should edit your autoexec.bat file):

1. right-click on MY Computer

2. choose Properties

3. choose Environment

4. click under User Variables

If you see LM_LICENSE_FILE already defined here, you can append the correct path (with a semi-colon) or remove the current definition (if it is not applicable) and put in the correct path to the license.dat file ($MATLAB\bin\license.dat, where $MATLAB is your root MATLAB directory). Always make sure to add the MATLAB directory at the *beginning* of the variable declaration. If you do not see LM_LICENSE_FILE defined here, you can create it.

For example:

If LM_LICENSE_FILE is listed as a variable and its value is listed as:

c:\temp

then you would edit this value to be

 C:\MATLABR12\bin\license.dat;c:\temp
     

In this example, the root MATLAB directory is C:\MATLABR12. If your root MATLAB directory is different, replace C:\MATLABR12 in the path above with your root MATLAB directory.

If LM_LICENSE_FILE is not defined in this list, create it and give it the correct path value mentioned above.