Did you install the extension twxs.cmake? It's a required dependency but was not installed when I installed cmaketools. Installing that solves my similar problem.

@jayphelps, as @wtianyi said, does installing the twxs.cmake extension help?

I have it listed in package.json as an extension dependency, and I thought that VSCode would use that to automatically install other extensions, but apparently not.

Yes, installing twxs.cmake (also known as just "CMake" in the marketplace) solved it for me. Here's a direct link to the correct one for anyone looking: https://marketplace.visualstudio.com/items?itemName=twxs.cmake

Feel free to close when you believe you've solved the issue preventing it from being installed automatically.

Thanks for your help!

I do have the same problem as @jayphelps but I already had Cmake (from twxs) installed

I needed to uninstall both CMake, and CMake Tools extensions. After re-installing them, everything worked again.

@kriegalex, are you still seeing this problem? Did this first start after the 0.9.5 update?

@vector-of-bool I just started getting this issue today also.

The same error appears in issue #163, but it may be a different issue. Check over there if the listed solution above doesn't work for you.

I just tried to uninstall, restart and reinstall, still having this problem. I don't know when it started because I have this problem since day one, but I only tried VS Code + CMake recently. I am working with Visual Studio 2015 and CMake 3.8 aside, that's why I didn't really go further.

This is the output of the Developer Tools :

[Extension Host] Error setting up client: AssertionError: Unknown cache entry type: undefined
    at Console.assert (console.js:95:23)
    at Function.parseCache (C:\Users\kriegalex\.vscode\extensions\vector-of-bool.cmake-tools-0.9.6\out\src\cache.js:116:29)
    at Function.<anonymous> (C:\Users\kriegalex\.vscode\extensions\vector-of-bool.cmake-tools-0.9.6\out\src\cache.js:65:50)
    at Generator.next (<anonymous>)
    at fulfilled (C:\Users\kriegalex\.vscode\extensions\vector-of-bool.cmake-tools-0.9.6\out\src\cache.js:4:58)

[Extension Host] Error during CMake Tools initialization! TypeError: Cannot read property 'getGlobalSettings' of undefined
    at ServerClientCMakeTools.<anonymous> (C:\Users\kriegalex\.vscode\extensions\vector-of-bool.cmake-tools-0.9.6\out\src\client.js:328:44)
    at Generator.next (<anonymous>)
    at fulfilled (C:\Users\kriegalex\.vscode\extensions\vector-of-bool.cmake-tools-0.9.6\out\src\client.js:4:58)

The second error can be removed by disabling CMake server (cmake.useCMakeServer=false).

@vector-of-bool I set cmake.useCmakeServer to false just like the fix in #163 and it worked, thanks.

I had the same problem. few days ago, I installed this extension on my PC and everything worked well. but yesterday, I installed it to my Laptop(Windows), the problem occured. and I tried everything like uninstall them and reinstall them one by one. but it's not working.
Everything sets just like my PC's except the result.

if i turn cmake.useCMakeServer to false. it'll working, but it build project to "vscproject" instead of "MinGW Makefiles".

OK guys, problem solved!
Platform: Windows + MinGW
Solution:

1. create a new copy of "mingw32-make.exe".
2. rename the copy to "make.exe".
3. restart your vscode.

I just checked: since vector-of-bool.cmake-tools depends on twxs.cmake extension, VS code automatically install the latter and doesn't allow to disable or uninstall it separately.
At least version 1.12 I'm using.

So, I've just pushed 0.9.7:

1. No more dependency on twxs.cmake, so that shouldn't be causing any issues anymore
2. @ytimenkov fixed some version parsing code that was lying about what version of CMake was installed. Should fix issues people are seeing with pre-3.7 versions.
3. @ytimenkov added better errors when initialization failed. This should help create future tickets!

As such, I'm going to close this issue and ask that anyone with any further issues open a new ticket using the new error messages that appear during a failed initialization.

Thanks for the help, everyone!