Cannot Run the Examples


I have successfully finished the " Install in an existing Python environment" section.

Now I am trying to test my installation by running the However, after I did python, I got the following error:

Loading extension module gymtorch…
Not connected to PVD
Segmentation fault (core dumped)

Could you give me some advice on how to fix this?

Thanks a lot,

Hi Bradley,

Can you confirm that you have a working Vulkan setup on your machine? Can you output the results of running vulkaninfo?

This is the most common cause of immediate segfaults on running.

Take care,


Thanks for your info. I believe I haven’t set up Vulkan on my machine yet. The output when I ran vulkaninfo is:


Vulkan Instance Version: 1.1.70

/build/vulkan-UL09PJ/vulkan-1.1.70+dfsg1/demos/vulkaninfo.c:2700: failed with VK_ERROR_INITIALIZATION_FAILED

I am very new to this simulation software and not quite familiar with Vulkan. Could you please briefly teach me how to set it up with the Isaac Gym?

Thank you and best regards,

Hi @yuan.truyenbao,

If you have your NVIDIA drivers installed properly on your system, the vulkan drivers should be there and should work. If vulkaninfo still doesn’t work, it would be better to ask for guidance on the Linux driver channel here:

Once vulkaninfo works, you shouldn’t have any problem with Isaac Gym.

Take care,

After vulkaninfo worked, this is how I solved my errors:

Thank you, Gav!