MATLAB: An unexpected error has occurred

MATLAB

Trying to do almost anything in MATLAB causes an error

An unexpected error has occurred.

This includes:

>> 2*2
>> z=2

Best Answer

Execute the following commands in a local folder such as the Desktop:

>> restoredefaultpath
>> rehash toolboxcache

If this resolves the issue, 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

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MATLAB: Error opening up file or changing paths

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

MATLAB: How to resolve the error with Workspace Browser on MATLAB Startup

These types of issues happen due to path issues and also when the cache is not up to date. The following steps will help resolve this issue.

Before modifying the search path, it is important to take a backup of your 'pathdef.m' file, which can be located by using the following command. Ensure that the copy is placed in a folder outside of the MATLAB path.

>> which -all pathdef

After taking the backup, please execute the following commands in the MATLAB Command Window to restore the default MATLAB search path and rehash the toolbox cache:

>> restoredefaultpath
>> rehash toolboxcache
>> sl_refresh_customizations

After this step, please use MATLAB/ Simulink to see if the issue occurs again. If the issue is resolved, then you may want to save the new MATLAB search path by executing the following command:

>> savepath

NOTE: This will remove any custom paths you may have created.

The following MATLAB Answers post is an additional resource on how to back them up:

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

Best Answer

Related Solutions

MATLAB: Error opening up file or changing paths

MATLAB: How to resolve the error with Workspace Browser on MATLAB Startup

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