I have the fuzzy logic toolbox installed with a proper license, but still when I use 'sigmf' it gives an error. Pls help.

I have the fuzzy logic toolbox in the apps and on the simulink library. But when I try to use the 'sigmf' function it gives the following error:

To use 'sigmf', the following product must be licensed, installed, and enabled: Fuzzy Logic Toolbox

[Walter Roberson]

What shows up if you use

which -all sigmf

I suspect it is going to show you a file name but then at the end say (no license)

[Asifuz Zaman]

Yes, its showing that. How do I rectify this?

[Haritha]

Go to add on's and install fuzzy again then add it to MATLAB you will get the solution

[Walter Roberson]

If it shows no license then it is a license issue rather than an install issue. Either your MATLAB does not include that as an individual license or else you are using a network license that does not include it. If you were using a network license that generally had that but had run out of keys then you would see a different error message.

[Asifuz Zaman]

How do I rectify it?

[Walter Roberson]

First try

license('test','Fuzzy_Toolbox')

If it is not able to find a license then it will return 0; if it is able to find a license, it will return 1.

Next,

getenv('LM_LICENSE_FILE')
getenv('MLM_LICENSE_FILE')     %chances are it will be empty

See https://www.mathworks.com/matlabcentral/answers/93105-what-are-the-lm_license_file-and-mlm_license_file-environment-variables-and-how-do-i-set-or-check-fo#answer_102453 for more information about those variables.

If you are using a stand-alone license then there may be only a single filename in LM_LICENSE_FILE . If you are using a network license, then you might see something like 1711@hostname and the hostname would be the name or IP address of the license server. In some cases on Mac you might see a list of local file names, as MATLAB has changed the location of the license files. If you see a file name that mentions "network" then you probably have a network license.

If both of those environment variables show up empty, then you probably have a stand-alone license. The license file locations are described in https://www.mathworks.com/matlabcentral/answers/99147-where-are-the-license-files-for-matlab-located

When you find the license file that lists the actual INCREMENT lines, look for INCREMENT Fuzzy_Toolbox