MATLAB: Do I get a license error when I try to run an executable I created using the demo version of the Math or Graphics Library

checkoutdemographicslibrarylicensemathMATLAB C/C++ Math Librarymlfscalarstandalonetrial

I can successfully compile my code into an executable, but when I run it, I receive the following error:

 Error: Could not find a demo license
 Cannot find license file (-1,73:2)

Best Answer

The demo version of Math and Graphics Libraries require a copy of the license file to exist in the same folder as the executable. To resolve the problem:

1. Make a copy of the license file that's in your $MATLAB/bin folder

2. Call it "demo.dat"

3. Save it in the same folder as your executable

4. Now try running the executable again.

NOTE: Applications created with the demo version of the Math and Graphics Libraries cannot be redistributed. This is a limitation of the demo version of these products. If you would like to redistribute your application, please purchase the full version of the Math and Graphics Libraries.

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MATLAB: Am I unable to distribute the stand-alone application built with the demo version of the MATLAB Compiler 3.0 (R13)

A demo version of the MATLAB Compiler 3.0 (R13) limits users such that they are not allowed to distribute their compiled stand-alone application. The full version of the MATLAB Compiler is necessary in order to distribute your compiled application to others.

There are two ways in which the demo version of the MATLAB Compiler differs from the full version:

First, the MGLINSTALLER, which normally resides in the following directory, does not exist in the Demo version of the MATLAB Compiler and Libraries:

$MATLAB/extern/lib/win32      (where $MATLAB is the root MATLAB directory)

The MGLINSTALLER is needed to distribute stand-alone applications to users who do not own MATLAB. This is not necessary in the demo version of the MATLAB Compiler because applications created with the demo version cannot be distributed.

Second, stand-alone applications created with the demo version of the MATLAB Compiler require a license file before they will run. This license file should be located in your $MATLAB\bin\win32 directory. That directory must be on the system path before any other installation of MATLAB.

If you install the stand-alone application on a system that does not have MATLAB, you will receive an error such as:

 Could not check out a license for CPP_Math_Library

 License Checkout Failed...

With the full version of the MATLAB Compiler, the generated executable does not check for any licenses. This is only used to prevent distribution of applications created using the demo version of the MATLAB Compiler.

MATLAB: How to perform array assignment using the MATLAB C Math Library

The MATLAB C Math Library includes a utility function called mlfIndexAssign that enables operations similar to MATLAB's array element assignment.

The following code illustrates the use of this function:

/* In MATLAB: A(2,3) = 19 */
mxArray *A = NULL;
mlfIndexAssign(&A,             /* Destination array   */
                 "(?,?)",        /* Index format string */
                 mlfScalar(2),   /* Subscript value     */
                 mlfScalar(3),   /* Subscript value     */
                    mlfScalar(19)); /* Source array */

Best Answer

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MATLAB: Am I unable to distribute the stand-alone application built with the demo version of the MATLAB Compiler 3.0 (R13)

MATLAB: How to perform array assignment using the MATLAB C Math Library

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