Why do I receive an Error 655 when activating MATLAB?

MathWorks Support Team

2015 8 21

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When activating MATLAB through the activation wizard, I receive an "Error 655: Individual license requires a Username". If I try to manually activate through the License Center on www.mathworks.com, I receive a similar error and no option to input a Username.

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MathWorks Support Team 2021-2-3

编辑：MathWorks Support Team 2021-2-5

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This error can occur if an Individual license has had Login Named User enabled, but the license was previously a Designated Computer license.This is a bug. To resolve this, please contact Mathworks Technical Support via the link below:

https://www.mathworks.com/support/contact_us.html