Class not found exception after installation on Windows

[andrii0lomakin]

After installation and execution of stewards.cmd on windows I have got

python .\bin\tornado WARNING: Using incubator modules: jdk.incubator.vector Error: Could not find or load main class None Caused by: java.lang.ClassNotFoundException: None

[stratika]

hi @andrii0lomakin, I guess by stewards.cmd you mean setvars.cmd? I tried last week (before the release) to install and run TornadoVM on Windows 11.

Can you please provide some additional information regarding:

• What is the terminal that you are using in Windows? Is it x64 Native Tools Command Prompt for VS 2022?
• What is the command that you built TornadoVM? To understand also which JDK, and backend you are building with.
• Which commit point did you build with?

[andrii0lomakin]

Hi @stratika
You can easily reproduce it on a Docker NVIDIA-based image.

[jjfumero]

TornadoVM does not have any image for PTX + Windows. Since no instructions for reproducing the error are provided, I will close this issue. Feel free to open new issues with concrete steps to reproduce them if this problem persists.

[andrii0lomakin]

Hi @jjfumero
I have provided such instructions.

You can easily reproduce it on a Docker NVIDIA-based image.

Please see above.

[andrii0lomakin]

 docker run --rm -it --entrypoint bash beehivelab/tornadovm-nvidia-openjdk:1.0.6
root@5682c8b3b0cf:/data# tornado
WARNING: Using incubator modules: jdk.incubator.vector
Error: Could not find or load main class None
Caused by: java.lang.ClassNotFoundException: None
root@5682c8b3b0cf:/data#

[jjfumero]

You need to pass your program:

$ tornado YourJavaProgram

You can also try

$ tornado --devices

Which runs a Java program to explore all devices reachable within your system. The image you are running is for the OpenCL backend on NVIDIA GPUs. So this image assumes you have an NVIDIA GPU that can run OpenCL.

[andrii0lomakin]

I supposed that, in such cases, some meaningful message would not harm instead of error of absence main class . I mean if I run java it prints me usage instructions instead of ClassNotFoundException message. But it is obviously not critical. Just FYI.

[jjfumero]

The ClassNotFoundException error is thrown by the Java Runtime, not by TornadoVM.

[andrii0lomakin]

@jjfumero I understand that, but it is possible to change script that it will provide more helpful message in such case. Anyway it is definitely not critical.