- The indicated directories are in the 'pathdef.m' file used by MATLAB, but the directories do not exist in the file system.
- The directories are added to the MATLAB path using a custom 'startup.m' file and the directories do not exist in the file system.
- https://www.mathworks.com/matlabcentral/answers/94040-why-do-i-receive-the-warning-message-warning-name-is-nonexistent-or-not-a-directory-when-i
- https://www.mathworks.com/matlabcentral/answers/42690-warning-name-is-nonexistent-or-not-a-directory