nRF Connect for VS Code failed to import bsim (tools/bsim)

[Thoste]

Hi,

I'm getting the following error over and over again from the nrf connect plugin in VSCode:

[west]: FATAL ERROR: failed manifest import in bsim (tools/bsim):
[west]: Failed importing "west.yml" from revision "384a091445c57b44ac8cbd18ebd245b47c71db94"
[west]: Hint: bsim must be cloned and its manifest-rev ref must point to a commit with the import data
[west]: To fix, run "west update"

This started happening after switching to a newer version of the nrf connect sdk (v2.9.2).
I'm still able to build my projects, however the continues error throwing slows down vscode and de building process it seems.
Furthermore, the applications tab of the nrf connect plugin seems to be very buggy.
I almost always have to delete the entire build folder and add the build configuration, I think this is also correlated to the errors I'm getting.

I tried several vs code version and nrf connect plugin versions. Im now on v2025.5.152 of the nrf connect for vs code.
And the following vs code version:

[dejans]

Hi,

How did you fetch BabbleSim?

[west]: FATAL ERROR: failed manifest import in bsim (tools/bsim):
[west]: Failed importing "west.yml" from revision "384a091445c57b44ac8cbd18ebd245b47c71db94"
[west]: Hint: bsim must be cloned and its manifest-rev ref must point to a commit with the import data
[west]: To fix, run "west update"

Which action from your side caused this error?

Best regards,
Dejan

[Thoste]

Hi,

I am not actively using bsim, but ncs/zehpyr is using it I guess. It started after installing a new toolchain v2.9.2 of ncs through the manage toolchains option in the nrf connect plugin of vs code.

Now every time I interact with the nrf connect plugin it spams this error for like 8-10 times. So if i click on a build configuration the error is thrown in the output window for 8-10 times. Then if i start a build, again the error is thrown for couple of times. The build does complete like normal, however when it finishes the output window again pops-up and shows the error is thrown again for x times. 

The error suggests that to fix it you run "west update", but this doesnt fix the issue. West update works and doesnt give any error. But then if I interact with the nrf connect plugin then the output window starts throwing errors again.