Name is nonexistent or not a directory

When I open the Matlab2021b,the following issues have occurred,but none of these paths appeared in my set path and pathdef.m.There's nothing in the startup.m either

[一鸣 王]

I don't really have these files on my computer

Answer 1

[Venkat Siddarth Reddy]

Hi 一鸣 王思聪,

The warnings mentioned above typically indicate that the directory paths specified in the warnings, which are added to the "MATLAB path," do not exist in the file system.

To troubleshoot this issue, please refer to the following article published by the "MathWorks Support Team":

https://www.mathworks.com/matlabcentral/answers/94040-why-do-i-receive-the-warning-message-warning-name-is-nonexistent-or-not-a-directory-when-i

I hope it helps!

Answer 2

[Walter Roberson]

Give the commands

restoredefaultpath;
rehash toolboxcache

savepath