Toolboxes installed and licensed, but not in use

Why are my toolboxes not in use when they are licensed and installed?

>> ver

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MATLAB Version: 9.11.0.1873467 (R2021b) Update 3

MATLAB License Number: redacted

Operating System: macOS Version: 11.6.4 Build: 20G417

Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

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MATLAB Version 9.11 (R2021b)

Image Processing Toolbox Version 11.4 (R2021b)

Mapping Toolbox Version 5.2 (R2021b)

Optimization Toolbox Version 9.2 (R2021b)

Statistics and Machine Learning Toolbox Version 12.2 (R2021b)

>> license('inuse')

matlab

>> license('test','MAP_Toolbox')

ans =

1

[Les Beckham]

It probably depends on your license type, but I'm pretty sure that if you haven't used any tools from a particular toolbox in your current Matlab session, it won't check out a license for that toolbox. So, you would see the behavior you describe.

You could try

license('checkout','MAP_Toolbox')

license('test','MAP_Toolbox')

[Dirk]

That worked. Also calling a function within the toolbox first prior to querying 'inuse' worked.

Answer 1

[Steven Lord]

I'm not entirely certain what your concern is. Are you wondering why license inuse doesn't list all of the products that appear in the output of ver? If so the explanation is simple: you haven't done anything in your MATLAB session that required functionality from that toolbox yet.

You've obviously called functions from MATLAB (if nothing else the license function is part of MATLAB) but you haven't called functions from any other product (or if you have, you did so long enough ago that the toolbox license was returned to the license server.) In your example, did you call any Mapping Toolbox functions before running the first of the license inuse calls?

[Dirk]

You are correct. I was testing for 'inuse' prior to (successfully and without typos) calling a function within the toolbox.