nvvfx.NvVFXError: NvVFX_Load failed: The effect has not been properly initialized (code -12)

[jtreminio]

Using the PyTorch Release 26.01 container.

Trying to upscale an LTX2.3 video:

loaded completely; 5733.00 MB usable, 1384.94 MB loaded, full load: True
!!! Exception during processing !!! NvVFX_Load failed: The effect has not been properly initialized (code -12)
Traceback (most recent call last):
  File "/workspace/dlbackend/ComfyUI/execution.py", line 524, in execute
    output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/dlbackend/ComfyUI/execution.py", line 333, in get_output_data
    return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/dlbackend/ComfyUI/execution.py", line 307, in _async_map_node_over_list
    await process_inputs(input_dict, i)
  File "/workspace/dlbackend/ComfyUI/execution.py", line 295, in process_inputs
    result = f(inputs)
             ^^^^^^^^^^^
  File "/workspace/dlbackend/ComfyUI/comfy_api/internal/init.py", line 149, in wrapped_func
    return method(locked_class, inputs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/dlbackend/ComfyUI/comfy_api/latest/_io.py", line 1764, in EXECUTE_NORMALIZED
    to_return = cls.execute(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/dlbackend/ComfyUI/custom_nodes/Nvidia_RTX_Nodes_ComfyUI/init.py", line 87, in execute
    sr.load()
  File "/usr/local/lib/python3.12/dist-packages/nvvfx/effects/base.py", line 119, in load
    self._effect.load()
nvvfx.NvVFXError: NvVFX_Load failed: The effect has not been properly initialized (code -12)

$ pip list | grep nvidia
nvidia-cuda-runtime-cu13               0.0.0a0
nvidia-cudnn-frontend                  1.17.0
nvidia-dali-cuda130                    1.53.0
nvidia-libnvcomp-cu13                  5.1.0.21
nvidia-ml-py                           13.590.44
nvidia-modelopt                        0.40.0
nvidia-nvimgcodec-cu13                 0.7.0.49
nvidia-nvjpeg                          13.0.2.28
nvidia-nvjpeg2k-cu13                   0.9.1.47
nvidia-nvtiff-cu13                     0.6.0.78
nvidia-resiliency-ext                  0.5.0
nvidia-vfx                             0.1.0.1

$ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2025 NVIDIA Corporation
Built on Tue_Dec_16_07:23:41_PM_PST_2025
Cuda compilation tools, release 13.1, V13.1.115
Build cuda_13.1.r13.1/compiler.37061995_0

RTX Pro 6000

[yussufbiyik]

!!! Exception during processing !!! NvVFX_Load failed: The effect has not been properly initialized (code -12)
Traceback (most recent call last):
  File "/root/ComfyUI/execution.py", line 530, in execute
    output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/ComfyUI/execution.py", line 334, in get_output_data
    return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/ComfyUI/execution.py", line 308, in _async_map_node_over_list
    await process_inputs(input_dict, i)
  File "/root/ComfyUI/execution.py", line 296, in process_inputs
    result = f(**inputs)
             ^^^^^^^^^^^
  File "/root/ComfyUI/comfy_api/internal/__init__.py", line 149, in wrapped_func
    return method(locked_class, **inputs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/ComfyUI/comfy_api/latest/_io.py", line 1716, in EXECUTE_NORMALIZED
    to_return = cls.execute(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/ComfyUI/custom_nodes/comfyui_nvidia_rtx_nodes/__init__.py", line 87, in execute
    sr.load()
  File "/root/.local/lib/python3.12/site-packages/nvvfx/effects/base.py", line 119, in load
    self._effect.load()
nvvfx.NvVFXError: NvVFX_Load failed: The effect has not been properly initialized (code -12)

Prompt executed in 0.21 seconds

Happens on RTX 5060Ti too

[eclgo]

Got the same error on RTX3080Ti Laptop GPU

[nregret]

`!!! Exception during processing !!! NvVFX_Load failed: The effect has not been properly initialized (code -12)

Traceback (most recent call last):

File "/opt/ComfyUI/execution.py", line 524, in execute

output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)

                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/opt/ComfyUI/execution.py", line 333, in get_output_data

return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)

                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/opt/ComfyUI/execution.py", line 307, in _async_map_node_over_list

await process_inputs(input_dict, i)

File "/opt/ComfyUI/execution.py", line 295, in process_inputs

result = f(**inputs)

File "/opt/ComfyUI/comfy_api/internal/init.py", line 149, in wrapped_func

return method(locked_class, **inputs)

File "/opt/ComfyUI/comfy_api/latest/_io.py", line 1764, in EXECUTE_NORMALIZED

to_return = cls.execute(*args, **kwargs)

File "/opt/ComfyUI/custom_nodes/comfyui_nvidia_rtx_nodes/init.py", line 87, in execute

sr.load()

~~~~~~~^^

File "/usr/local/lib64/python3.13/site-packages/nvvfx/effects/base.py", line 119, in load

self._effect.load()

~~~~~~~~~~~~~~~~~^^

nvvfx.NvVFXError: NvVFX_Load failed: The effect has not been properly initialized (code -12)`
4080 same questions

[niaoyu123]

1. 升级驱动版本到570.195.03+
2. 容器环境变量配置NVIDIA_DRIVER_CAPABILITIES

你就能解决所有问题

[tillski791234]

It took me a half weekend.. This cryptic error is pure trolling from nvidia ;-) An intense strace helped to look for opened files and libs so I found it. This was an LXC node with passthrough but maybe the problem is also for docker.

Cause: missing libnvidia-ngx.so.1 inside the LXC container.

Why this was hard to find:

• ldd looked clean
• CUDA/Torch worked
• failure happened only at NvVFX_Load / sr.load()

strace showed that NGX was loaded dynamically at runtime, and the container did not have:

/usr/lib/x86_64-linux-gnu/libnvidia-ngx.so.1

After bind-mounting/copying that library into the container and running ldconfig, nvvfx started working.

So if someone sees code -12 in a container, check for missing libnvidia-ngx.so.1, not just the usual CUDA/TensorRT libs.

I also discovered that nv-vfx is not working on a 5090. But on a 5060ti - so it´s not a general Blackwell problem. The output on the 5090 is always black. 4080 is also working. Driver: 590.44.01

[jcp219]

For anybody else that gets this far and needs the extra connection between tillski791234's comment and the solution, see below.

You can find that file in your WSL folder through File Explorer:
\\wsl.localhost\Ubuntu\usr\lib\wsl\lib\libnvidia-ngx.so.1

Then either:

• Copy it to your container (Replace DOCKER_CONTAINER_NAME with your Docker container name):
  docker cp \\wsl.localhost\Ubuntu\usr\lib\wsl\lib\libnvidia-ngx.so.1 DOCKER_CONTAINER_NAME:/usr/lib/x86_64-linux-gnu/libnvidia-ngx.so.1

• Or add it to your docker folder and then update your dockerfile:
  COPY libnvidia-ngx.so.1 /usr/lib/x86_64-linux-gnu/libnvidia-ngx.so.1

PS: Thanks @tillski791234

[Lolologist]

Going from what jcp219 mentioned above, here's what got me unstuck (not in docker, just in WSL):
echo "/usr/lib/wsl/lib" | sudo tee /etc/ld.so.conf.d/wsl-nvidia.conf
sudo ldconfig

Alternatively, set the env var before launching ComfyUI:
export LD_LIBRARY_PATH="/usr/lib/wsl/lib:$LD_LIBRARY_PATH"

I had to open a new terminal to get that working and, VERY FRUSTRATINGLY, the first terminal I tried it in just silently died. New terminal after that and bam, working. No idea why that happened but at least there's a fix.