Why do I receive "(MLM) Not master server, checkout attempt of 'MATLAB' from user@host refused" in the license manager log file?

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MathWorks Support Team 2017-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/349491-why-do-i-receive-mlm-not-master-server-checkout-attempt-of-matlab-from-user-host-refused-in-t

编辑： MathWorks Support Team 2024-8-23，14:08

Clients are reporting they receive License Manager Error -18 when they try to start MATLAB, and I am seeing errors in the log file. Why do I receive "(MLM) Not master server, checkout attempt of 'MATLAB' from user@host refused" in the license manager log file?

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Answer 1

MathWorks Support Team 2024-8-23，0:00

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编辑：MathWorks Support Team 2024-8-23，14:08

This error message indicates the DAEMON line is not formatted correctly. Possible errors include placing the quotations that normally surround the MLM path around additional parts of the DAEMON line. For example, if a static port number is being used, the following line would be incorrectly formatted and would cause this error:

DAEMON MLM "C:\Program Files\MATLAB\R201Xx\etc\win64\mlm.exe port=27001"

Instead, the line should move the quotation to only surround the MLM path:

DAEMON MLM "C:\Program Files\MATLAB\R201Xx\etc\win64\mlm.exe" port=27001

Clients will receive License Manager Error -18 when this error is written to the log file. If you are unable to resolve the error, please contact MathWorks Licensing and Installation Support, including your license file for analysis.