I mean like when ever i click pristine build in the vs code i am getting this below error
"Unable to build: SDK not found. Ensure that a valid SDK is used for the build configuration."
but the build is getting done when it is done in the terminal 
I mean like when ever i click pristine build in the vs code i am getting this below error
"Unable to build: SDK not found. Ensure that a valid SDK is used for the build configuration."
but the build is getting done when it is done in the terminal 
Hello,
Can you please generate and upload the support information in nRF Connect for VS Code? It is generated by clicking this button:

Does that list v3.1.1 under "sdks", like this:
"sdks": [
{
"version": "v3.2.1",
"path": "c:\\ncs\\v3.2.1"
},
{
"version": "v3.2.0",
"path": "c:\\ncs\\v3.2.0"
},
{
"version": "v3.1.1",
"path": "c:\\ncs\\v3.1.1"
},
{
"version": "v3.1.0",
"path": "c:\\ncs\\v3.1.0"
If not, can you please try to run the following command? (does require a standalone installation of nrfutil):
nrfutil sdk-manager toolchain launch --terminal --ncs-version v3.1.1 (this will open a new window, use this one for the rest of the commands)
cd into the root folder of ncs v3.1.1, e.g. c:\ncs\v3.1.1
run "west update" and wait for it to finish. Does it indicate any errors? When this is done, close VS Code and relaunch it. Does it work now? If not, can you generate the support information once more, and upload this as well?
Best regards,
Edvin
// IMPORTANT: The following data can contain sensitive or confidential information about your environment.
// If you do not want others to see this information, make sure to remove it before sharing the data.
// For help and support, visit Nordic Semiconductor's DevZone at devzone.nordicsemi.com/.
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this is the whole thing which i got, after that the west update dint work actually it is not returning any errors also
Ok, the nRF Connect for VS Code plugin will only work if you are using an NCS release, as far as I know. So unfortunately, if you are using standalone Zephyr, it will probably not work. The reason is that the plugin needs to know where NCS is located, to select the correct SDK to build with your application. If you can't point to the SDK, it doesn't know what to do.
It is possible to have the SDK isolated from the application folder, but it still needs to be an NCS release. You can also modify the source files in the SDK, such as merging particular pull requests and using the main branch instead of a stable release.
What are you trying to use? Zephyr (without NCS)?
Best regards,
Edvin
Yes that is what happened, the ncs folder got disconnected from the nrf extension alone, but still works with the workspace as i told the terminal based build is working. I am using an official release only of the NCS which do have the zephyr
NCS without Zephyr? Or do you mean Zephyr without NCS?
NCS with zephyr only. i do have the sdk version with the zephyr.
Still doesn't make complete sense to me.
Do you mean a normal NCS (nRF Connect SDK)? Or Zephyr only, without the nRF part of it?
What folders are present in the root folder of your SDK? Can you please send a screenshot?
Best regards,
Edvin
Still doesn't make complete sense to me.
Do you mean a normal NCS (nRF Connect SDK)? Or Zephyr only, without the nRF part of it?
What folders are present in the root folder of your SDK? Can you please send a screenshot?
Best regards,
Edvin

this is the ncs folder which i am having.
and my manage tool chain menu looks like the above, and moreover when i click the open sdk directory in the manage sdk menu it is opening the C:\ncs\v3.1.1 folder only, am i missing something, it is a nRf Connect SDK (NCS) right
Can you try: in VS Code, press file -> open folder, and open the root folder of your SDK (the one named v3.1.1). Then press the "+" sign ("open an existing application"), navigate to your application folder, and select "Open". This adds the application to the workspace, without removing the SDK from the workspace. Then you can generate a new build configuration:

And you should see the SDK version and toolchain version in the two upper options.
Best regards,
Edvin
so basically i tried what you were saying, 
and even added the build configuration and it still looks like this 
it dint change anything here
regards
vishva
When you create your build configuration, does v3.1.1 show up as an option? And how about the toolchain? Does it appear there?
Does it build the first time after you click "generate and build" in the "Add Build Configuration" tab, but then later doesn't find the SDK version? Or does it not build at all the first time around either?
Is this only an issue for v3.1.1? Or is it an issue for older NCS versions as well? Can you try with e.g. v3.0.1 and see if the issue is the same?
Best regards,
Edvin
Also, can you please share the content of your: v3.1.1\.west\config file?
BR,
Edvin