# An error message coming out when reopen the VS Code

**URL:** <https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353>\
**Category:** Installation\
**Created:** [January 23, 2026, 3:28am UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353 "2026-01-23T03:28:37Z")\
**Posts on this page:** 15\
**Page:** 1

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**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [January 23, 2026, 3:28am UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/1 "2026-01-23T03:28:37Z")

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Hello,

After completing the Pumas license activation and installation in VS Code, I exited the program. When I reopened the VS Code, an error message always appeared before the Julia extension loaded. I’m wondering whether this is a normal occurrence that can be ignored, or if it indicates an issue that needs to be resolved to ensure Pumas will work properly in the future. I’ve attached the error message for your review. Thank you very much for your help!

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/6a466e39680b4a5fbc30a920394a6d71101c856f.png)

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**Author:** ![andreasnoack](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/andreasnoack/32/22_2.png) [@andreasnoack](https://discourse.pumas.ai/u/andreasnoack)\
**Post date:** [January 23, 2026, 8:51am UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/2 "2026-01-23T08:51:29Z")

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I haven’t seen that error before. Please share the content of your `settings.json`

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**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [January 23, 2026, 1:58pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/3 "2026-01-23T13:58:53Z")

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> [@andreasnoack](#):
>
> settings.json

Hi Andreas,

I attached the image. Please take a look to see if this is “settings.json”. Thank you so much!

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/1e4bedc03d8d1e387fafc991f5c38b03819b503f.png)

I attached

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**Author:** ![andreasnoack](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/andreasnoack/32/22_2.png) [@andreasnoack](https://discourse.pumas.ai/u/andreasnoack)\
**Post date:** [January 23, 2026, 2:24pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/4 "2026-01-23T14:24:26Z")

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Did you try to close VSCode again and restart it? Also, do you see `.vscode` folder in the File Explorer?

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**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [January 23, 2026, 3:00pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/5 "2026-01-23T15:00:37Z")

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Hi Andreas,

I just closed VSCode again and restart it. The error message still came out first, followed by Julia. I can see “.vscode” folder in the File Explorer. Please take a look. Thank you!

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/f905dfe82efb4883d200f5beed2d02d3d6ae73a0.png)

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**Author:** ![andreasnoack](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/andreasnoack/32/22_2.png) [@andreasnoack](https://discourse.pumas.ai/u/andreasnoack)\
**Post date:** [January 23, 2026, 3:19pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/6 "2026-01-23T15:19:06Z")

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I was referring to the File Explorer inside of VSCode, i.e. the one you see if you click the two sheets of paper in the navigation bar to the left, see below. However, it might show the same folder as the one you shared here. Is there anything in that `.vscode` folder? Please share the content here.

 ![Screenshot 2026-01-23 at 16.16.45](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/faf8d0096de39362d2263bd89f3f312c60b0734a.png)

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**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [January 23, 2026, 3:46pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/7 "2026-01-23T15:46:57Z")

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Hi Andreas,

I open the Explorer folder and .vscode folder. Please take a look at the image. Thank you!

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/0932f0e0e9a656512cf27d74e5482450557fc4a9.png)

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<div class="post-metadata">

**Author:** ![andreasnoack](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/andreasnoack/32/22_2.png) [@andreasnoack](https://discourse.pumas.ai/u/andreasnoack)\
**Post date:** [January 23, 2026, 4:24pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/8 "2026-01-23T16:24:14Z")

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In VSCode, please try to completely remove the Julia extension, restart VSCode, install it again and let me know if the issue is still present

 ![Screenshot 2026-01-23 at 17.23.35](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/94d7f8cd5a96b60bcd4161d877ed2a8a7edaac9d.jpeg)

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<div class="post-metadata">

**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [January 23, 2026, 5:50pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/9 "2026-01-23T17:50:52Z")

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Hi Andreas,

I uninstalled Julia Extension, restarted VSCode, and reinstalled it. The error message still came out.

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/6edcea7af7de44ce3a6ceb3471762e6b08467191.png)

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<div class="post-metadata">

**Author:** ![andreasnoack](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/andreasnoack/32/22_2.png) [@andreasnoack](https://discourse.pumas.ai/u/andreasnoack)\
**Post date:** [January 26, 2026, 10:19am UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/10 "2026-01-26T10:19:52Z")

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Could you please try to open a new terminal by clicking on the “+” in the upper right of your screenshot. Then in that terminal, please start Julia by typing “julia” and hit enter. That should start a normal (non-Pumas) Julia session. Do you see the same error? If you do, could you try to run julia from "cmd.exe` as well?

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**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [February 9, 2026, 4:05am UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/11 "2026-02-09T04:05:07Z")

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Hi Andreas,

Sorry for the delayed reply, and thank you so much for your help. I tried the change you suggested, and the original error message is gone. Please take a look at the updated output.

However, when I started running Pumas, I encountered a new error. Is there anything I can do to resolve it? Or should I uninstall everything and reinstall them following the online instruction again.

Thanks.

Best,  
Indy

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/566cd801e96f7f30c5c132071dc1975abe4d1cd8.png)

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/41c0414060fb20b44dddf79dda219a7f9d902290.png)

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**Author:** ![vijay](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/vijay/32/96_2.png) [@vijay](https://discourse.pumas.ai/u/vijay)\
**Post date:** [February 9, 2026, 4:40am UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/12 "2026-02-09T04:40:08Z")

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@izang can you please follow the instructions here. It seems that your default julia is not the version that Pumas needs. Follow the instructions here and that should resolve it.

> [@Pumas installation error](https://discourse.pumas.ai/t/pumas-installation-error/1267/8):
>
> Please make sure your old installation of Pumas 2.6.1 is removed from Add/Remove programs open a new terminal (command prompt). type juliaup status check if the \* is set next to julia 1.11.7 or 1.11.6 or something else? It has to be set to Pumas@2.7.1 or Pumas@2.7.0 , whichever one you installed. to do this, you need to do juliaup default Pumas@2.7.1 check juliaup status again and now the `*` should be beside Pumas.. restart vscode Now start julia REPL and let us know what comes up

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<div class="post-metadata">

**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [February 9, 2026, 2:10pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/13 "2026-02-09T14:10:06Z")

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Hi Vijay,

Thank you so much for your help. Following your instructions resolved the previous errors. To ensure that **Pumas** is now fully operational and correctly configured, would you mind taking a quick look at the attached screenshots? Thanks.

Best, Indy

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/1a847fd36517c1a8b1d2043de6461af820d25c46.png)

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/pumas/original/1X/291899e03c23981b016baaa1c99026df0250f5ae.jpeg)

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<div class="post-metadata">

**Author:** ![vijay](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/vijay/32/96_2.png) [@vijay](https://discourse.pumas.ai/u/vijay)\
**Post date:** [February 9, 2026, 4:11pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/14 "2026-02-09T16:11:23Z")

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That looks correct @izang!

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<div class="post-metadata">

**Author:** ![izang](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@izang](https://discourse.pumas.ai/u/izang)\
**Post date:** [February 9, 2026, 4:59pm UTC](https://discourse.pumas.ai/t/an-error-message-coming-out-when-reopen-the-vs-code/1353/15 "2026-02-09T16:59:58Z")

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Thank you so much!  
Best, Indy