why do I get "Licensing error: -8,523" although activation was successful?

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Bulent Tank 2015-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/239621-why-do-i-get-licensing-error-8-523-although-activation-was-successful

评论： Bulent Tank 2023-10-25

I keep on having "Licensing error: -8,523" on my linux system. The activation was successful and for the first time I thought I will be able to start Matlab without any problems, but no chance.

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Answer 1

Riya 2023-10-25

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Hello Bulent Tank,

I see that you are facing license related error while using MATLAB. 

Please note that, this issue generally indicates that the license file is served from the Network License Manager and that there is a problem with the license.dat file on the machine running the Network License Manager. The cause of this error may be due to one of the following:

The Host ID for which the license.dat file was generated is not the Host ID of the machine hosting the Network License Manager.
Missing, corrupt, or incorrect characters in the license.dat file itself.
The system time and date are not set properly. Check to make sure that the date and time are set correctly on the machine before proceeding below.

For instructions to resolve this error, please see the link below provided by MathWorks Support Team about error -8,523:

https://in.mathworks.com/matlabcentral/answers/100496-why-do-i-receive-license-manager-error-8

I hope it helps! 

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Bulent Tank 2023-10-25

Thank you for your prompt answer!!! Meanwhile, I must have installed Matlab (with academic license) at least 10 times...

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Answer 2

Walter Roberson 2023-10-25

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If you are getting license manager error -8 on a system that you have run activation on, then one of the following is the case:

your license path refers to a license manager host as well as referring to a local license file but the license manager host has problems. For example if you used to use a license manager host but you got a standalone license, then the settings might now tell it to look at the host as well as the local license file. 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 and you might need to delete the previous license manager file; OR
you are running a cracked version of MATLAB.