Problems with savepath in R2023b

239 vues (au cours des 30 derniers jours)
Matt J
Matt J le 25 Sep 2023
Modifié(e) : Xiaorui Tang le 28 Sep 2023
I have just installed R2023b on two different machines. Both give the following problem, when trying to use savepath
>> addpath(pwd)
>> savepath
Warning: Unable to save path to file 'C:\Program Files\MATLAB\R2023b\toolbox\local\pathdef.m'. You can save your path to a different location
by calling SAVEPATH with an input argument that specifies the full path. For MATLAB to use that path in future sessions, save the path to
'pathdef.m' in your MATLAB startup folder.
> In savepath (line 238)
Any idea why this warning is issued and how to fix it?
  2 commentaires
Peter Nelson
Peter Nelson le 25 Sep 2023
I am seeing the same issue

Connectez-vous pour commenter.

Réponse acceptée

Matt J
Matt J le 25 Sep 2023
Modifié(e) : Matt J le 25 Sep 2023
Tech Support advised running Matlab "As Administrator" and this did solve the problem.
  2 commentaires
Xiaorui Tang
Xiaorui Tang le 28 Sep 2023
Modifié(e) : Xiaorui Tang le 28 Sep 2023
Thank you for bringing this issue to our attention.
We have confirmed that this is a bug in the savepath function on Windows in MATLAB R2023b, and we sincerely apologize for any inconvenience this may have caused.
We're working on a solution for this issue, which will be included in one of the upcoming MATLAB 2023b Update releases soon.
In the meantime, there are two workarounds to save the path:
1. Manually change the permissions of the pathdef.m file in Windows:
  • Use the "which pathdef" command in MATLAB to identify the location of the pathdef.m file. It should be located at <matlabroot>\toolbox\local\pathdef.m
  • Navigate to this location in your Windows File Explorer.
  • Right-click on the pathdef.m file and select 'Properties'.
  • Navigate to the 'Security' tab.
  • Click on 'Edit' to change permissions, and ensure 'Full control' is checked under the 'Allow' column for your user account.
2. Run MATLAB with administrative rights:
  • Close MATLAB if it is currently open.
  • Right-click on your MATLAB shortcut on the desktop or in the start menu.
  • Select 'Run as administrator'.
These are temporary workarounds and should be unnecessary once the bug is fixed in the upcoming MATLAB 2023b Update releases.
We appreciate your understanding as we work to resolve this issue.
MathWorks Dev Team

Connectez-vous pour commenter.

Plus de réponses (2)

Walter Roberson
Walter Roberson le 25 Sep 2023
Déplacé(e) : Walter Roberson le 25 Sep 2023
On a shared system, users should not have write access to pathdef.m inside the MATLAB installation directory.
If this is not a share system, you could try using File Explorer to set you as having write permission to the file. But it being Windows, I do not know if UAC would override that write access since it is a file living inside c:\Program Files . Easiest is to savepath to your userpath . Or change your preferences to point to a different folder; see
  1 commentaire
Rolfe Power
Rolfe Power le 25 Sep 2023
I don't think this is the issue here. There are valid reasons for setting the pathdef for all users and this worked in previous versions given the user attempting to set the path had admin privileges. Now, it prompts for these privileges then throws the warning seen above even when the change is approved.

Connectez-vous pour commenter.

Bruno Luong
Bruno Luong le 25 Sep 2023
Modifié(e) : Bruno Luong le 25 Sep 2023
On Windows to fix it you need to change the Security setup of the file pathdef.m Right Click on file, Properties, Tab Security, Select Users, then click on Edit, Check Full Control, Then Apply.


En savoir plus sur Startup and Shutdown dans Help Center et File Exchange





Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by