Unrecognized function or variable 'gausswin'

Hello,

I have a problem with the function gausswin. I get the error "Unrecognized function or variable 'gausswin'". I have the Signal Processing Toolbox installed.

What can be the problem?

Thanks!

[Walter Roberson]

Reinstall the toolbox.

[Torsten]

I have the Signal Processing Toolbox installed.

And licenced ?

What do you get if you enter

license checkout Signal_Processing_Toolbox

[Alessia Perilli]

I thought so, but indeed I get:

License checkout failed.

License Manager Error -5

Cannot find a license for Signal_Processing_Toolbox.

It is an academic license, I got it from my university. Maybe I should check with them.

So is this the problem?

[Alessia Perilli]

Something I tried now, before seeing your answer, is to add the toolbox folder to the search path. Now I get a similar error but on a different function,

Unrecognized function or variable 'eml_invariant'.

which I don't even know what it is.

Thank you for the answers!

Answer 1

[Walter Roberson]

eml_invariant is a function that would normally only be used during code generation. setdiff() and computer() do not contain any reference to them in normal times.

However, if you do not have a license for a toolbox, and you try to add to the path files that are intended to be used only by MATLAB Compiler or MATLAB Coder, then you can encounter problems with eml_invariant not being found, because you are executing a different version of the code only intended for code generation.

You need to install and license the missing toolbox, and make sure that the code generation directories are not on your MATLAB path.

[Alessia Perilli]

Thank you, I solved by unistalling Matlab2022a and reinstalling 2021b, no problem with that version, all the licenses are ok.