How do I troubleshoot installation and licensing issues with Simulink Coder and Embedded Coder?

I would like to generate C/C++ code from a Simulink model. However, I encounter one or several of the following issues: 

1. In the Configuration Parameters dialog box, the Code Generation tab is missing. 

2. When I try to build my model, I get errors such as:

This coder feature requires a "Simulink Coder" license
This coder feature requires a "Embedded Coder" license
Unable to check out the Simulink Coder license which is required to generate code
Unable to check out the Embedded Coder license which is needed to generate Embedded C code

3. Using R2019b or newer, in Simulink Toolstrip, I am unable to find the Simulink Coder app or Embedded Coder app.

4. Using R2019a or older, the Simulink menu Code > C/C++  Code > Code Generation Options... is unavailable or produces an error:

Page "Code Generation" is not a valid page.

Answer 1

[MathWorks Support Team]

C/C++ code generation features for Simulink models are only available if you have the following products installed and licensed:

• MATLAB Coder
• Simulink Coder
• Embedded Coder (optional)

NOTE: Embedded Coder is required if you use its features, or if your system target file is based on ert.tlc rather than grt.tlc. For MathWorks products, see our Product Requirements. For third-party targets or tools, check with the vendor or see our Third-Party Products page.

Please try out the following 5 troubleshooting steps if you encounter one of the symptoms above:

1. Check Licensing: 

Check out the licenses by running the following commands in MATLAB:

>> [status,errmsg] = license('checkout','matlab_coder')       % MATLAB Coder (required)
>> [status,errmsg] = license('checkout','real-time_workshop') % Simulink Coder (required)
>> [status,errmsg] = license('checkout','RTW_Embedded_Coder') % Embedded Coder (optional)

Each command should return 'status = 1' and "errmsg = 0×0 empty char array" if the license checkout is successful.

Note that Embedded Coder is an extension of Simulink Coder. This means that Embedded Coder only works with Simulink models when Simulink Coder is also installed and licensed. Simulink Coder itself always requires MATLAB Coder.

If a license checkout fails, or the products are not listed as in use after checkout, contact your MATLAB License Administrator or MathWorks Installation Technical Support. 

 

2. Check product installation: 

Execute the following command to get the full list of installed products and associated licenses per product:

>> ver -support 

Check that MATLAB Coder and Simulink Coder are listed (and Embedded Coder if applicable).

If a product is missing from the above list, then add MATLAB Coder and Simulink Coder (and Embedded Coder if applicable) toolboxes to your existing installation as shown in the following link:

https://www.mathworks.com/matlabcentral/answers/101885-how-do-i-install-additional-toolboxes-into-an-existing-installation-of-matlab

 

3. Try restarting MATLAB and your PC:

Restarting MATLAB and/or your PC may resolve the issue, especially if a MathWorks-related product was recently installed or updated.

 

4. Check if the Code Generation option is present for a shipped model:

Open the following model:

>> vdp 

and check for the Code Generation option in Model Configuration Parameters (CTRL+E).

If the code generation options are available for the shipped model:

     a. Check if the model without the options has any issues in the Upgrade Advisor.

     b. Try to re-create the model in a fresh file by copying and pasting all blocks.

If the code generation options are available for the shipped model and the issue persists for your model after the above checks, contact MathWorks Technical Support. 

 

5. Restore your MATLAB path and cache: 

Restore your MATLAB path and toolbox cache as explained in the following article:

https://www.mathworks.com/matlabcentral/answers/2052722-how-can-i-perform-initial-troubleshooting-of-matlab-or-simulink-errors

If the issue persists after going through all the above steps, contact MathWorks Technical Support. When contacting MathWorks Technical Support, please include the outcome of the above checks and your license information.