Matlab doesn't open (it's installed and activated)

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I'm on a Windows 10 machine. I had a well functioning Matlab 2018a installed and then suddenly it stopped working. When I try to open Matlab, it shows up in my Task Manager but the software just doesn't open.
I uninstalled 2018a, downloaded and installed 2018b and activated it, but it still shows the same behavior.
Can someone please help me? I've wasted hours of effort on this and can't make it work.
paulo sigauque
paulo sigauque on 8 Aug 2022
I had the same problem and your comment solve my problem.. Thank you for it...

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Accepted Answer

Kojiro Saito
Kojiro Saito on 20 Mar 2019
Edited: Kojiro Saito on 14 Oct 2019
It might be because MATLAB's prefdir is corrupted.
Please delete the following folders (previous prefdir)
  • C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018a
  • C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018a_licenses
  • C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018b
  • C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018b_licenses
and launch MATLAB R2018b again.

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More Answers (6)

Arthur Warlop Piers de Raveschoot
thank you very much!!!

syed huzaifa
syed huzaifa on 16 Dec 2019
thank you

Ramila Wijesuriya
Ramila Wijesuriya on 25 Jan 2021
Thanks. It works !!

NN on 9 Jun 2021
I am facing teh same problem, but i couldnt find the APP data folder
  1 Comment
Ravi Gangani
Ravi Gangani on 15 Oct 2021
'APP data folder ' is hidden forlder . you have enable 'show hidden folder' from folder option.

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Sakshi chawla
Sakshi chawla on 4 Aug 2021 worked

Ravi Gangani
Ravi Gangani on 15 Oct 2021
thanks , yaa Its works




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