Opening multiple instances of MATLAB causes endless folder access errors

2022 11 17
1 个回答
更新时间：2025 1 28
18 次查看（30 天）

1 个投票

Whenever I try to open two instances of MATLAB, I run into an endless loop of error windows. For example, if I'm running 2022b and I try to start an instance of 2021b, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
...and so on.
I'm using a Mac OS Monterey 12.6.1.
Does anyone know how to fix this?

5 个评论
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Hi Chad!
Did you manage to solve this issue? I'm having the same problem with the 2 Matlab versions (R2019a and R2022a) installed on my Mac using Big Sur 11.7.9.
Karthik Reddy Lyathakula
编辑：Karthik Reddy Lyathakula 2024-3-24
@MathWorks Support Team Did you have a solution for this? I am also facing the same issue on MAC when two versions of MATLAB are open at the same time.
Margot
Margot 2025-1-28
I have the same issue with matlab 2022b and 2024b. Is there a solution yet?

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回答（1 个）

Jan
Jan 2022-11-17

0 个投票

What about allowing Matlab to access your documents folder?

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Chad Greene
Chad Greene 2022-11-17
I've sure tried! When I click OK to allow access for R2022b, a window immediately pops up asking if I should allow access for R2021b, so I click OK, and immediately a window pops up asking me to allow access for R2022b, and so on.
Jan
Jan 2022-11-18
I assume, that starting up Matlab accesses the settings files in the user's Documents folder. If a setting is changes, this might trigger the other instance of Matlab.
I did not meant to allow the access once, but in general. This should be a task for the operating system. Try the control panel for data protrection and security and allow both Matlab versions accessing your Documents folder.
Chad Greene
Chad Greene 2022-11-18
Thanks for your engagement on this, Jan. Unfortunately I can't add both MATLAB_R2021b and MATLAB_R2022b at the same time. Every time I give one of them access to my Documents folder, the other loses access.
Jan
Jan 2022-11-18
This sounds very strange. It should be possible to gain access to several applications.
Which folders inside the Documents folder are concerned?
Chad Greene
Chad Greene 2022-11-18
Chiefly the MATLAB folder is inside the Documents folder.

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Chad Greene
Chad Greene
2022-11-17

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Margot
Margot
2025-1-28

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