Unable to install in latest version of ComfyUI 0.3.44

[Eshinio]

After having done a completely clean ComfyUI install with the latest version, I am unable to install Upscaler Tensorrt, it keep giving an import failed error, which is the one below:

Traceback (most recent call last):
  File "E:\AI\ComfyUI v4\ComfyUI\nodes.py", line 2124, in load_custom_node
    module_spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "E:\AI\ComfyUI v4\ComfyUI\custom_nodes\ComfyUI-Upscaler-Tensorrt\__init__.py", line 6, in <module>
    from .trt_utilities import Engine
  File "E:\AI\ComfyUI v4\ComfyUI\custom_nodes\ComfyUI-Upscaler-Tensorrt\trt_utilities.py", line 32, in <module>
    import tensorrt as trt
ModuleNotFoundError: No module named 'tensorrt'

I have attempted "Try fix" and to change version, but it makes no difference. More info:
ComfyUI: 0.3.44
Python: 3.12.10
Pytorch: 2.7.1
Windows 10

[reaperhammer]

Based on this error, you have not installed tensorrt python module.
By default, in Windows, Comfy uses a custom python path, not a venv, so if you used the 'default' installation method you should run something like this,
open cmd.exe;

chdir /d "E:\AI\ComfyUI v4\ComfyUI\python_embeded"
python.exe -s -m pip install -r "E:\AI\ComfyUI v4\ComfyUI\custom_nodes\ComfyUI-Upscaler-Tensorrt\requirements.txt"

[LassosLabs]

it's compatible with python 3.12?

[kanarch66]

I cannot use it with python 3.12 either.

[rustyblood]

Same thing, Im on python 3.11.9, get same error. I have checked that Tensorrt module is installed, as it replies with REQUIREMENT SATISFIED, but comfyui fails to import this upscaler module

[MichaelTheBui]

having the same issue

[rustyblood]

Finally got it working:

• Upgraded comfyui to 0.3.49 via the update_comfyui_and_python_dependencies.bat file.

• Used Python 3.11.9. I use portable comfyui, so make sure that the python files on your python_embeded are updated properly. I have not tried with 3.12.x.

• apply this install to make sure wheel is installed.

• Installed Tensort from the regular github repository. You might get errors when importing it into comfyui IF your python version is not updated as per previous step.

• Installed Tensorrt upscaler. Finally was imported fine into comfyui.

PROS:

• Stupidly fast upscaler. Takes time the first time to run since it needs to build the engine, but once done, it is LUDICROUS FAST, about 1s for a 1024 x 1024 4x upscale.
• Really easy to use, just put the nodes as mentioned on the install process.

CONS:

• The more you use it, the more your computer will slow down. First upscales are blazing fast, but after some repetitions, computer tends to slow down, even crash. Be careful with how big your upscale will be, as this node DEVOURS VRAM.
• Even after flushing VRAM with EasyUse nodes, it aleviates a bit how many times you can upscale without needing to restart comfyui or your whole computer, but it does not fix the issue.

System:
Legion 7i Pro
Intel i9-13900HX
RTX4080 - 12Gb
RAM - 96Gb

[ai-capybara]

It also did not work in the latest standalone version of ComfyUI for Windows (v0.3.57), which includes PyTorch 2.8.0+cu129 and Python 3.13.6. I resolved the issue by running the following commands inside the python_embeded folder:

.\python.exe -m pip install --upgrade pip setuptools wheel
.\python.exe -m pip install tensorrt-10.13.2.6-cp313-none-win_amd64.whl
.\python.exe -m pip install nvidia-cudnn-cu12==9.2.0.82 onnx polygraphy --no-cache-dir

I assume most ComfyUI users are on Windows and use the standalone version. It would be ideal if these users could use the module without needing to perform any manual setup steps.