What does this mean and how do I correct it?:java.io.FileNotFoundException: C:\Users\jaaks_000\AppData\Roaming\MathWorks\MATLAB\R2016a\matlab.prf (Access is denied)

Question

John Muller 2016-7-8

评论： Tolga Sonmez 2022-12-30

This occurs when I start Matlab:

_ java.io.FileNotFoundException: C:\Users\jaaks_000\AppData\Roaming\MathWorks\MATLAB\R2016a\matlab.prf (Access is denied)_*

What does it maen and how can I fix it?

Answer 1

Shashank 2017-9-12

Hi John,

The issue here seems to be that MATLAB is unable to find the PREFDIR or access the parent directory of PREFDIR.

The following steps might resolve the issue:

1.Type PREFDIR command in MATLAB command prompt.This gives you the path to the directory. Open up the PREFDIR using Windows Explorer.

2. Close MATLAB.

3. The folder which contains the PREFDIR folder would usually be hidden. Unhide this by right-clicking on the folder and choosing properties.

4. Once it is made sure that the folder is not hidden, restart MATLAB.

- Shashank

Tolga Sonmez 2022-12-30

Thank you very much, you saved my day.

What does this mean and how do I correct it?:java.i​o.FileNotF​oundExcept​ion: C:\Users\j​aaks_000\A​ppData\Roa​ming\MathW​orks\MATLA​B\R2016a\m​atlab.prf (Access is denied)