That's not how it works, you have to provide the --graphics option on the command line (use --help to see the options). On Windows D3D11 is the default and that should work. Your graphics card is not involved while compiling. Will try myself in a minute.

Works fine for me on Windows with latest Kha and default settings. What version of Kha do you use?

I fetched the latest version of kha this morning.

Hm, no idea what you're doing then. Are you sure that latest version of Kha is actually used by Kode Studio? You can see that in the compile log.

It shows the correct path. It will build to VS project and compiles but crashes with an exception error:

Exception thrown at 0x00007FF8933FA131 (d3d11_3SDKLayers.dll) in ComputeShader.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF.

Well, that doesn't sound like the error you described initially. Could indeed be your graphics card then. What card is it?

Yea its a different error from Visual studio. its an older Quadro k4200 but supports directx 11.2. Will this example run in Kode Studio? I built it for windows and compiled it in VS to get that last error.

Ah, you originally just tried to run that in Kode Studio directly, now I understand. That doesn't work because it defaults to an HTML5 build and HTML5 can not do compute shaders. You'll have to switch to Krom (in the debug panel on the top). Maybe also get a current version of Krom (the Krom_bin repository) and point Kode Studio to it (kromPath in the settings).
That said, with Krom it will probably fail the same way it does for the Windows version. Can you see where exactly that error happens in Visual Studio?

It compiles with krom but its been running for 10 min now and gives the error "Display file not found in class path (1,1)".

In general Krom never displays anything for me.

The VS error happend at line 277 in the ComputeImpl.cpp

context->UpdateSubresource(shader->impl.constantBuffer, 0, nullptr, constantsMemory, 0, 0);

"Display file not found" is just a code completion error and typically happens when you open code for backend X while backend Y is selected, it's not a Krom error. Do you see something in another output panel? Did you update Krom to the latest version? And can you see a 0xFFFFFFFFFFFFFFFF value in the parameters at line 277?

Sorry, yes I did update per your instructions. There is no other error in any panel. I cant see any value at that memory location.

Didn't ask for a value at that memory location, did ask for the values in the relevant variables. Also what happens when you run Krom from the command line?

So for the heck of it I went back to the default Kha and Krom installation that comes with Kode Studio and it worked. Krom ran other examples and the compute shader example worked. But other projects im working on to learn Kha do not because some features do not exist in the default Kode Studio verrsion of Kha. Ill get the values for the varibles.

PS thank you very much for all of your help.

When it worked in an older version the fix is probably simple, so... gimme those values.

So I unistalled everything and fetched Kha again, downloaded the Krom binaries, reinstalled nodejs and set the paths from within Kode Studio. I also installed the Kha extention pak in Visual Studio Code. The build to windows now compiles in VS from Kode Studio for the compute shader example, I cant recreate this problem now. But now I get this error from Krom in Kode Studio and Visual Studio Code. Im not sure why this is showing up all of a sudden.

C:\Devlopment\Kode\libraries\Kha\Backends\Krom/kha/compute/Compute.hx:81: characters 84-92 : kha.compute.Access has no field getIndex
C:\Devlopment\Kode\libraries\Kha\Backends\Krom/kha/compute/Compute.hx:81: characters 162-170 : kha.compute.Access has no field getIndex

Also Krom just doesnt run for anything in Kode Studio, no errors are shown in any terminal. I installed the Kha extention pak in Visual Studio Code and ran some projects from there Krom works.

Im also not well versed in VS so please have patience with me.

Did some more googling and found that there is a problem getting a krom window to open from Kode Studio.

Fixed that Krom compile error - that not showing up before means you were using an old version of Kha.

Well thats interesting. It must be that I wasn't updating from git-hub properly. Because the path was defiantly set correctly. The error is gone now but the Krom window crashes in Visual studio code. No out put errors were observed. Is there a crash log ?

Thank you again for the help.

As I said before, try to run it from the command line. Does it work now when compiling for Windows? Because if it doesn't, the Krom crash is expected.

It does work when compiling for windows. I did run it from the command line, Krom still crashes. Thank you.

Can you run Krom (from https://github.com/Kode/Krom) in Visual Studio? You'll just have to put in the start parameters in the Visual Studio properties.