NvVFX_Load failed: The requested feature or capability was not found (code -14)

[SurpassHR]

Got error on my RTX 4070S.
ComfyUI Version: c2d9a4fe3cd4b3b3534b2d4037043ce9064c1e5f

!!! Exception during processing !!! NvVFX_Load failed: The requested feature or capability was not found (code -14)
Traceback (most recent call last):
  File "/home/hr/Projects/Codes/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 "/home/hr/Projects/Codes/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 "/home/hr/Projects/Codes/ComfyUI/execution.py", line 307, in _async_map_node_over_list
    await process_inputs(input_dict, i)
  File "/home/hr/Projects/Codes/ComfyUI/execution.py", line 295, in process_inputs
    result = f(**inputs)
             ^^^^^^^^^^^
  File "/home/hr/Projects/Codes/ComfyUI/comfy_api/internal/__init__.py", line 149, in wrapped_func
    return method(locked_class, **inputs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hr/Projects/Codes/ComfyUI/comfy_api/latest/_io.py", line 1764, in EXECUTE_NORMALIZED
    to_return = cls.execute(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hr/Projects/Codes/ComfyUI/custom_nodes/Nvidia_RTX_Nodes_ComfyUI/__init__.py", line 87, in execute
    sr.load()
  File "/home/hr/Projects/Codes/ComfyUI/.venv/lib/python3.12/site-packages/nvvfx/effects/base.py", line 119, in load
    self._effect.load()
nvvfx.NvVFXError: NvVFX_Load failed: The requested feature or capability was not found (code -14)

[RookieZoe]

Same issue here (RTX 4090):

!!! Exception during processing !!! NvVFX_Load failed: The requested feature or capability was not found (code -14)
Traceback (most recent call last):
  File "/home/zoe/comfyui/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 "/home/zoe/comfyui/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 "/home/zoe/comfyui/ComfyUI/execution.py", line 307, in _async_map_node_over_list
    await process_inputs(input_dict, i)
  File "/home/zoe/comfyui/ComfyUI/execution.py", line 295, in process_inputs
    result = f(**inputs)
             ^^^^^^^^^^^
  File "/home/zoe/comfyui/ComfyUI/comfy_api/internal/__init__.py", line 149, in wrapped_func
    return method(locked_class, **inputs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/zoe/comfyui/ComfyUI/comfy_api/latest/_io.py", line 1764, in EXECUTE_NORMALIZED
    to_return = cls.execute(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/zoe/comfyui/ComfyUI/custom_nodes/comfyui_nvidia_rtx_nodes/__init__.py", line 87, in execute
    sr.load()
  File "/home/zoe/.miniconda3/envs/comfy/lib/python3.11/site-packages/nvvfx/effects/base.py", line 119, in load
    self._effect.load()
nvvfx.NvVFXError: NvVFX_Load failed: The requested feature or capability was not found (code -14)

[iCELAKE01]

Experiencing the same on 3070, tried reinstalling but to no avail

[caissonfiv]

same，4090D

[jonnie]

I have exactly the same problem on my RTX 5090 running on Ubuntu. I tried running the example code (from here: https://pypi.org/project/nvidia-vfx) outside of ComfyUI and that too has the same problem. I've checked that my machine, drivers, etc. meet the requirements. Unfortunately, nvidia-vfx seems to be closed source so cannot investigate why this is happening.

[iCELAKE01]

I have exactly the same problem on my RTX 5090 running on Ubuntu. I tried running the example code (from here: https://pypi.org/project/nvidia-vfx) outside of ComfyUI and that too has the same problem. I've checked that my machine, drivers, etc. meet the requirements. Unfortunately, nvidia-vfx seems to be closed source so cannot investigate why this is happening.

there is no reason for it to be a wsl2/ubuntu issue right?

[jorgemcgomes]

I don't think the problem is related to Comfy at all.
I'm getting the same error running the official example in Google Colab:
https://colab.research.google.com/drive/1mF-d2PcptP59Si6azOEGAbX25jLHPNgL?usp=sharing

Tried Nvidia L4, A100, and G4 (RTX PRO 6000), all fail with this same error.
There is probably an issue with some dependency, but it's not clear at all what it might be since the error is cryptic.

Also probably not the best place to post this, but Nvidia-VFX isn't open source so...

[RookieZoe]

Same issue here (RTX 4090):

!!! Exception during processing !!! NvVFX_Load failed: The requested feature or capability was not found (code -14)
Traceback (most recent call last):
  File "/home/zoe/comfyui/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 "/home/zoe/comfyui/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 "/home/zoe/comfyui/ComfyUI/execution.py", line 307, in _async_map_node_over_list
    await process_inputs(input_dict, i)
  File "/home/zoe/comfyui/ComfyUI/execution.py", line 295, in process_inputs
    result = f(**inputs)
             ^^^^^^^^^^^
  File "/home/zoe/comfyui/ComfyUI/comfy_api/internal/__init__.py", line 149, in wrapped_func
    return method(locked_class, **inputs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/zoe/comfyui/ComfyUI/comfy_api/latest/_io.py", line 1764, in EXECUTE_NORMALIZED
    to_return = cls.execute(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/zoe/comfyui/ComfyUI/custom_nodes/comfyui_nvidia_rtx_nodes/__init__.py", line 87, in execute
    sr.load()
  File "/home/zoe/.miniconda3/envs/comfy/lib/python3.11/site-packages/nvvfx/effects/base.py", line 119, in load
    self._effect.load()
nvvfx.NvVFXError: NvVFX_Load failed: The requested feature or capability was not found (code -14)

Update:

I Just wipe NVIDIA Driver out，and reinstall Driver and CUDA to latest version:

➜ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2026 NVIDIA Corporation
Built on Mon_Mar_02_09:52:23_PM_PST_2026
Cuda compilation tools, release 13.2, V13.2.51
Build cuda_13.2.r13.2/compiler.37434383_0

~/comfyui via 🅒 base …
➜ nvidia-smi    
Fri Mar 20 16:09:43 2026       
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 595.45.04              Driver Version: 595.45.04      CUDA Version: 13.2     |
+-----------------------------------------+------------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce RTX 4090        Off |   00000000:01:00.0  On |                  Off |
| 30%   28C    P8             16W /  450W |     498MiB /  49140MiB |      0%      Default |
|                                         |                        |                  N/A |
+-----------------------------------------+------------------------+----------------------+

+-----------------------------------------------------------------------------------------+
| Processes:                                                                              |
|  GPU   GI   CI              PID   Type   Process name                        GPU Memory |
|        ID   ID                                                               Usage      |
|=========================================================================================|
|    0   N/A  N/A          435085      C   ...da3/envs/comfy/bin/python3.12        456MiB |
+-----------------------------------------------------------------------------------------+

and then, Rebuilt the comfyui runtime environment, and use comfy --here install --restore reinstall comfyui，then, handle the problematic dependencies.

After these tedious steps, the error disappeared and it is now running normally.

[rahdirigs]

I don't think the problem is related to Comfy at all. I'm getting the same error running the official example in Google Colab: https://colab.research.google.com/drive/1mF-d2PcptP59Si6azOEGAbX25jLHPNgL?usp=sharing

Tried Nvidia L4, A100, and G4 (RTX PRO 6000), all fail with this same error. There is probably an issue with some dependency, but it's not clear at all what it might be since the error is cryptic.

Also probably not the best place to post this, but Nvidia-VFX isn't open source so...

If its the same error code (-14) that you are getting, then I don't think the message is as cryptic as the other code (-12). The error message (for code -14) states the device lacks the capability, so my first hunch would be to check the driver versions. On the pypi project it states that:

Linux: 570.190+, 580.82+, or 590.44+

is required. In my case I had 580.75, so I upgraded to 580.105, and the error went away. Since you are using colab, I am not sure if upgrading drivers is an option.

[SurpassHR]

I don't think the problem is related to Comfy at all. I'm getting the same error running the official example in Google Colab: https://colab.research.google.com/drive/1mF-d2PcptP59Si6azOEGAbX25jLHPNgL?usp=sharing
Tried Nvidia L4, A100, and G4 (RTX PRO 6000), all fail with this same error. There is probably an issue with some dependency, but it's not clear at all what it might be since the error is cryptic.
Also probably not the best place to post this, but Nvidia-VFX isn't open source so...

If its the same error code (-14) that you are getting, then I don't think the message is as cryptic as the other code (-12). The error message (for code -14) states the device lacks the capability, so my first hunch would be to check the driver versions. On the pypi project it states that:

Linux: 570.190+, 580.82+, or 590.44+

is required. In my case I had 580.75, so I upgraded to 580.105, and the error went away. Since you are using colab, I am not sure if upgrading drivers is an option.

That makes sense, but newer drivers are not stable at all, I'm tired of testing NV drivers on linux, so just let it be, the upscaling is fast but not good enough to make me reinstall all of these.

[jorgemcgomes]

I don't think the problem is related to Comfy at all. I'm getting the same error running the official example in Google Colab: https://colab.research.google.com/drive/1mF-d2PcptP59Si6azOEGAbX25jLHPNgL?usp=sharing
Tried Nvidia L4, A100, and G4 (RTX PRO 6000), all fail with this same error. There is probably an issue with some dependency, but it's not clear at all what it might be since the error is cryptic.
Also probably not the best place to post this, but Nvidia-VFX isn't open source so...

If its the same error code (-14) that you are getting, then I don't think the message is as cryptic as the other code (-12). The error message (for code -14) states the device lacks the capability, so my first hunch would be to check the driver versions. On the pypi project it states that:

Linux: 570.190+, 580.82+, or 590.44+

is required. In my case I had 580.75, so I upgraded to 580.105, and the error went away. Since you are using colab, I am not sure if upgrading drivers is an option.

In the Colab environment:

+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.82.07              Driver Version: 580.82.07      CUDA Version: 13.0     |
+-----------------------------------------+------------------------+----------------------+

Which matches the project requirements. So who knows. The requirements might be wrong, or it might be an issue somewhere else.

[rahdirigs]

I don't think the problem is related to Comfy at all. I'm getting the same error running the official example in Google Colab: https://colab.research.google.com/drive/1mF-d2PcptP59Si6azOEGAbX25jLHPNgL?usp=sharing
Tried Nvidia L4, A100, and G4 (RTX PRO 6000), all fail with this same error. There is probably an issue with some dependency, but it's not clear at all what it might be since the error is cryptic.
Also probably not the best place to post this, but Nvidia-VFX isn't open source so...

If its the same error code (-14) that you are getting, then I don't think the message is as cryptic as the other code (-12). The error message (for code -14) states the device lacks the capability, so my first hunch would be to check the driver versions. On the pypi project it states that:

Linux: 570.190+, 580.82+, or 590.44+

is required. In my case I had 580.75, so I upgraded to 580.105, and the error went away. Since you are using colab, I am not sure if upgrading drivers is an option.

In the Colab environment:

+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.82.07              Driver Version: 580.82.07      CUDA Version: 13.0     |
+-----------------------------------------+------------------------+----------------------+

Which matches the project requirements. So who knows. The requirements might be wrong, or it might be an issue somewhere else.

a) its never going to work on T4 on Colab, since its Tesla architecture
b) you can try running !ldconfig -p | grep nvidia and verify if you see anything. TL;DR it needs the nvidia specific linkers and not just CUDA / TensorRT. if you don't see anything then the (-14) error code is valid. if you see some entries, you need to look for specifically libnvidia-ngx.so without this linker, even if everything else is present, you will run into -12 error code.

[SurpassHR]

I don't think the problem is related to Comfy at all. I'm getting the same error running the official example in Google Colab: https://colab.research.google.com/drive/1mF-d2PcptP59Si6azOEGAbX25jLHPNgL?usp=sharing
Tried Nvidia L4, A100, and G4 (RTX PRO 6000), all fail with this same error. There is probably an issue with some dependency, but it's not clear at all what it might be since the error is cryptic.
Also probably not the best place to post this, but Nvidia-VFX isn't open source so...

If its the same error code (-14) that you are getting, then I don't think the message is as cryptic as the other code (-12). The error message (for code -14) states the device lacks the capability, so my first hunch would be to check the driver versions. On the pypi project it states that:

Linux: 570.190+, 580.82+, or 590.44+

is required. In my case I had 580.75, so I upgraded to 580.105, and the error went away. Since you are using colab, I am not sure if upgrading drivers is an option.

In the Colab environment:

+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.82.07              Driver Version: 580.82.07      CUDA Version: 13.0     |
+-----------------------------------------+------------------------+----------------------+

Which matches the project requirements. So who knows. The requirements might be wrong, or it might be an issue somewhere else.

a) its never going to work on T4 on Colab, since its Tesla architecture b) you can try running !ldconfig -p | grep nvidia and verify if you see anything. TL;DR it needs the nvidia specific linkers and not just CUDA / TensorRT. if you don't see anything then the (-14) error code is valid. if you see some entries, you need to look for specifically libnvidia-ngx.so without this linker, even if everything else is present, you will run into -12 error code.

The Tesla T4 is based on the Turing arch, not the Tesla arch. I think the real reason is that @jorgemcgomes needs to use a driver version equal to or newer than 580.83, 580.82.xx is not included in 580.82+.