Installation of older Matlabversion does not work while R2020b is installed, why?

Question

Martin Krippl 2021-9-3

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https://ww2.mathworks.cn/matlabcentral/answers/1446019-installation-of-older-matlabversion-does-not-work-while-r2020b-is-installed-why

回答： Martin Krippl 2021-9-3

Hello,

I have installed R2020b, and want to install an older version, because a toolbox (Ledalab) does not work with it.

When I try to install R2019b or older, it looks like the installation is done, but only a few folder are installed (appdata, bin, etc, sys, uninstall).

Does anyone have an idea, what I could do?

Best, Martin.

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Rik 2021-9-3

Do you have anything to suggest why this would be related to the already installed version?

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Answer 1

Martin Krippl 2021-9-3

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https://ww2.mathworks.cn/matlabcentral/answers/1446019-installation-of-older-matlabversion-does-not-work-while-r2020b-is-installed-why#answer_780139

During installation one has to install the network licence manager, although it is already installed. At some point (one of several trials of installation) I was told to do something with it. I do not remember anymore what exactly (delete, change directory of its installation etc..).