Facing license Issues while running a function from Communication Toolbox.

I am encountering a License Manager Error -4 when trying to use a function from the Communication Toolbox, even though I have an active license for it. The error message suggests that the maximum number of users for 'Signal_Blocks' has been reached, is 'Signal_Blocks' related to the DSP System Toolbox?.

License checkout failed.
License Manager Error -4
Maximum number of users for Signal_Blocks
reached.
Try again later.

I'm trying to understand why I'm getting this error when accessing a function from the Communication Toolbox. Does using a function from one toolbox require licenses for other toolboxes as well? Additionally, how can I find out which toolboxes are included in my current license?

Answer 1

[Walter Roberson]

Signal_Blocks is the DSP System Toolbox

You can use the command ver to find out which toolboxes you have installed.

Finding out which toolboxes you have licensed is a bit more complicated.

Officially, visit https://www.mathworks.com/mwaccount/?s_tid=gn_myac and click on your license, and you will be taken to a list of all of the features you have licensed.

But sometimes it is easier to use the Add-On Explorer and search for toolboxes you are interested in, and see whether they show up as "Included in your license"

[Luna]

Thanks for the Info

Answer 2

[Pavan Sahith]

Hello Luna,

The error message you encountered, "License Manager Error -4: Maximum number of users for Signal_Blocks reached,". I think Signal_Blocks is the DSP System Toolbox- https://www.mathworks.com/matlabcentral/answers/196989

In MATLAB, some functions from one toolbox may require components or features from another toolbox. This is particularly common with toolboxes that are designed to complement each other. In your case, although you are using a function from the Communication Toolbox, it may internally rely on features provided by the DSP System Toolbox.

I genrally use this command to view a list of all the toolboxes that are currently active under my license.

ver

This MATLAB Answer post might help you

• https://www.mathworks.com/matlabcentral/answers/101313

Additionally, I find this cheatsheet helpful whenever I encounter license-related issues:

• https://www.mathworks.com/matlabcentral/answers/404028

Hope It would help

[Luna]

Thanks for the Info

I found the cheat sheet intresting and pinned it to my browser