MATLAB: Error opening up file or changing paths

Question

Whenever I try to open a file I get:

error: input character is not valid in matlab 

Trying to change path or use "restoredefaultpath" leads to:

error: attempt to execute a script builtin as a function <C:\Program Files\MATLAB\R2011b\toolbox\compiler\mcr\matlab\…

 

Answer 1

Restart MATLAB

Determine your root path by executing:

>> matlabroot

Navigate to the file:

<matlabroot>\toolbox\local\restoredefaultpath.m

Run the file and then execute:

>> rehash toolboxcache

If opening files now works, execute:

>> savepath

Note: This will remove any custom paths you may have created. If desired, please see the following link for how to back them up:

https://www.mathworks.com/matlabcentral/answers/166871-how-will-running-the-restoredefaultpath-and-savepath-commands-affect-my-custom-paths-and-how-do-i-ba