Error writing name_file.m. Access denied.

Hi everyone, I have a sudden problem when I try to save or run the file. The error window say "Error writing name_file.m. Access denied". It's really strange because it has always worked well. I tryed to:

• Change path location
• Open Matlab as administrator
• Change Matlab version from 2016 to 2018
• Change Matlab file

But i have always the same problem. I can not understand what the problem could be. This is the screenshot:

[Geoff Hayes]

michele - is it only this file that is causing the problem or is it others? have you tried saving the file to a different folder? what are the permissions on the file (read only or read/write)?

[michele paoletti]

All files give me the same problem, i tried to save in a different folder (and give me another error) and permission are read and write.

[Brent Vanhul]

I have exactly the same error message and tried the same as listed. I firstly encountered the problem 11 Feb 2019 and now I'am not able to write to,save or create any file/folder anywhere on my C drive by using matlab (Windows 10 Version 1803).

pwd: 'C:\Users\vanhu\Documents\MATLAB\...'

Matlab installed: 'C:\Program Files\MATLAB\R2018b'

I checked the permissions for all the different groups and users for the pwd and everyone has: modify, read & execute, list folder contents, read, write.

[michele paoletti]

Hi Brent, i have encountered the problem in the same period, i have Windows 10 Home Version 1803.

[Mehul Mulay]

Hi!

I have faced a similar problem on MacOS.

Please let me know the solution..

[Andy Mendez Cuello]

Hi.

I have a Windows 10 Pro, I had the same problem and in the end it was for safety issues for applications control, I gave him to allow change in Matlab and I stopped giving me that mistake.

Greetings.

Answer 1

[michele paoletti]

I solved the problem installing Matlab R2018b and going in C:\Program Files\MATLAB\ , add privileges access to the group called packet application:

But using Matlab R2016b the problem remain. I use now the new version to avoid this problem.

[Brent Vanhul]

Thanks a lot, this fixed it!! I changed the security settings for the package application, and I also had to exclude Matlab from windows defender.

[michele paoletti]

Very good, you're welcome!

[karthikeya anil kumar]

yeah, thats the correct way of solving error, or even some times we need to change the secutity settings of a entire drive or for folders in which you are trying to save the (.m) MATLAB FILE.

Answer 2

[Supratim Shit]

You are facing this issue becasue of a feature called controlled folder access in Windows 10. It helps you protect valuable data from malicious apps and threats, such as ransomware.

You need to go to Settings > Update & Security > Windows Security > Virus and Threat protection > Manage Ransomware Protection > Allow an app through controlled folder access > Add your application

[Jaisal Chauhan]

thank you, man! You have saved my life with this answer, because I was able to save my experimetal results at the last moment for a project that i had to submit!

I don't know how you found out such a detailed intricate reason behind the issue, but kudos!

[Hassan Kianmehr]

Just login to say thank you!

[Mehdi Hatami]

Thank you man For this great and valuable help you have given me!

[Zhao Lu]

Very great and valuable answer !!

[yagmur gedik]

thank you very much

[Brijesh Shah]

Thank you very much

[shubhashree bal]

This worked.

Thank you!

[FELIPE ANANGANÓ LEIME]

perfect, thank you!!!

[Kevin Tapia Pantoja]

This is the right answer, I was working well until I activated the Ransomware protection but I just didn't allow Matlab. Thank you

[johnny ramone]

After almost a year sundelly the Ransomware protection blocked matlab, just go to recently block app and allow it. Thank you <3

Answer 3

[Pruthvi Muppavarapu]

Disabling the anti-virus might help resolve the issue.

If you are using Windows Defender; an exclusion may need to be made for MATLAB. This can be done in Windows 10 by following the steps mentioned in the link:

https://support.microsoft.com/en-us/help/4028485/windows-10-add-an-exclusion-to-windows-security

[michele paoletti]

Good!

Answer 4

[Pratibha Dimri]

what worked for me was :

first go to search bar on windows-type matlab-run as admin