Unable to perform the harness operation for the externally saved test harness since the directory is not writable

When trying to externally creating a test haness, simulink is returning this error:

Error:Unable to perform the harness operation for the externally saved test harness 'untitled_Harness1' since the directory is not writable.

[1] This issue happens with any matlab version.

[2] Running Matlab as admin does not solve the issue.

[3] Even after the file beeen synchronized with OneDrive, the issue persists.

[4] I have windows R/W permissions to the folder

[Flavio Luiz Puhl Jr]

Any idea how to solve this?

Answer 1

[Madheswaran]

Hi Flavio,

I have came across similar error once. I checked the permissions with 'fileattrib' command, and noticed that value for 'UserWrite' was 0 eventhough I had Windows read & write access to the directory. I flipped the 'UserWrite' value to 1, later it worked fine for me.

You can modify the permissions using the below command:

fileattrib(<your directory address>, '+w');

For more information, refer to the following documentation: https://mathworks.com/help/matlab/ref/fileattrib.html

I hope this would solve the issue you are facing!

[Flavio Luiz Puhl Jr]

Hi Madheswaran,

Thanks a lot for your answer. Now it is working and I can externally create the test harness.

PS: in order to fileattrib work, the path shall not have spaces (maybe other characteres are also not allowed, but I didn't test)

Thanks again.

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