Why do I receive a connection error when launching MATLAB with Login Named User enabled?
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Why do I receive the following error when launching MATLAB with Login Named User (LNU) enabled:
Connection Error
Accepted Answer
MathWorks Support Team
on 22 Jan 2026
Edited: MathWorks Support Team
on 23 Jan 2026
0 votes
A connection error when launching MATLAB using Login Named User indicates that MATLAB is being prevented from reaching MathWorks' licensing servers. Please visit the link below for connection error issues.
Which ports and addresses do MathWorks products and MathWorks Online Services use?
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on 23 Jan 2026
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