In VS Code, nRF Connect toolchain dropdown is empty, and adding the nRF Edge AI Add-on shows “Already exists”

[Jarvis Zhang]

Hi,

I’m seeing two related issues while using nRF Connect for VS Code. Below are my environment details and what I observed.

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Environment

• OS: Windows 11

• VS Code: latest stable

• nRF Connect for VS Code extension: 2026.1.1327

• nRF Connect SDK:

  • Previously installed v3.0.0

  • Later installed v3.2.1 via the VS Code extension

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Issue 1: Cannot select a toolchain in “Manage Toolchains”

Symptoms

In VS Code, under nRF Connect → Manage Toolchains:

• Fetch completes successfully

• The UI shows “Select a toolchain to install”

• But no dropdown/options appear

• Only Toolchain v3.0.0 exists on my system

Workaround (CLI)

I was able to resolve it by installing the toolchain manually:

nrfutil toolchain-manager install --ncs-version v3.2.1

After this, VS Code correctly detected the v3.2.1 toolchain.

I’d like to confirm whether this is a known VS Code extension issue, or if it is related to having multiple NCS versions installed.

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Issue 2: Adding the nRF Edge AI Add-on shows “Already exists”

Background

I’m trying to use the nRF Edge AI Add-on, which is selected from:

→ Create a new application
→ Browse nRF Connect SDK Add-on Index
→ Edge Ai Add-on

Notes

• I have never installed this add-on before

• I also cannot find any local files related to the nRF Edge AI Add-on content that I see in the GitHub repository（nrfconnect/sdk-edge-ai: Edge AI add-on）

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Questions

1. Is the empty toolchain dropdown a known issue? What is the recommended fix?

2. How can I correctly install/use the nRF Edge AI Add-on? I want to deploy a model trained with Neuton.

3. Additional question: Is there any way to use a Neuton model with an existing nRF5 SDK project? I have read the documentation stating it is not supported, but from an engineering perspective it might be possible. At the moment I do not want to migrate my project to nRF Connect SDK.

Thanks for any guidance. I can provide logs if needed.

[Priyanka]

Hi Jarvis,

Issue 1:

Could you attach your support Information? You can find it here:

Issue 2:

Could you try to click on the folder icon in the top right and maybe select the folder, say, c:\ncs\edge_Ai ?

At present what it means is that your folder already exists, i.e. you need to create a new folder in order to install it into. So what I did is that, in my existing path, of c:\ncs , I am asking it to create a new folder called edge_Ai and install it into that folder.

Please try it this way.

-Priyanka