LTXV Video node fails to install in Comfyui

[Lutzro]

Updated to newest Comfyui and tried to install LTXV but install failed. Log trace says Import
Failed because cached_download from HuggingFace_Hub not supported. HuggingFace has removed cached_download function and only support hf_hub_download. Install code needs to be fixed.

Thanks

[Nubebuster]

I let Claude loose on the problem expecting to open a PR on this repo. But

"""
Based on our analysis, here's what to tell that user:

The issue is NOT with ComfyUI-LTXVideo's code - it's already correctly updated and uses
modern APIs (snapshot_download, not the deprecated cached_download).

Root cause: An outdated diffusers package (v0.27.2 or older) in your environment is
trying to import the removed cached_download function.

Solution:
pip install --upgrade diffusers peft

Why this happens:

• ComfyUI-LTXVideo itself never used cached_download - it uses the correct
  snapshot_download
• The error comes from diffusers/utils/dynamic_modules_utils.py:28 trying to import the
  deprecated function
• Updating diffusers to v0.35.1+ and peft to v0.17.1+ resolves the compatibility issue

No code changes needed - the extension is already properly written. Just update your
Python environment dependencies and the import error will disappear.
"""

Please note that I did go into ComfyUI/custom_nodes/ComfyUI-LTXVideo/ and ran "git pull origin master"
So that might fix also.

TLDR

  cd ~/ComfyUI/custom_nodes/ComfyUI-LTXVideo/
  git pull origin master
  pip install --upgrade diffusers peft

[Lutzro]

Thanks for the email I appreciate your response. The issue is Hugging Face changed the cache_download function and named-cache is no longer supported you use use the hf-download function call. After several hours of wading through the code, I found it in the Python diffuser library. It is just one line removing the Named Cache call and everything is working fine. Thanks for ur help Miami Joe Independent Technical Consultant Operations Research Scientist Data Scientist Cell: 954 401 3390 From: Mark Cockram ***@***.***> Sent: Monday, August 25, 2025 5:04 PM To: Lightricks/ComfyUI-LTXVideo ***@***.***> Cc: Lutzro ***@***.***>; Author ***@***.***> Subject: Re: [Lightricks/ComfyUI-LTXVideo] LTXV Video node fails to install in Comfyui (Issue #266) [https://avatars.githubusercontent.com/u/7793993?s=20&v=4]Nubebuster left a comment (Lightricks/ComfyUI-LTXVideo#266)<#266 (comment)> I let Claude loose on the problem expecting to open a PR on this repo. But """ Based on our analysis, here's what to tell that user: The issue is NOT with ComfyUI-LTXVideo's code - it's already correctly updated and uses modern APIs (snapshot_download, not the deprecated cached_download). Root cause: An outdated diffusers package (v0.27.2 or older) in your environment is trying to import the removed cached_download function. Solution: pip install --upgrade diffusers peft Why this happens: * ComfyUI-LTXVideo itself never used cached_download - it uses the correct snapshot_download * The error comes from diffusers/utils/dynamic_modules_utils.py:28 trying to import the deprecated function * Updating diffusers to v0.35.1+ and peft to v0.17.1+ resolves the compatibility issue No code changes needed - the extension is already properly written. Just update your Python environment dependencies and the import error will disappear. """ Please note that I did go into ComfyUI/custom_nodes/ComfyUI-LTXVideo/ and ran "git pull origin master" So that might fix also. - Reply to this email directly, view it on GitHub<#266 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BTYQJXXPXRG3SKRXSV7KK3L3PN24HAVCNFSM6AAAAACDXP22VGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTEMRRG4ZTONJVGY>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

[ShadowTimGit]

Thank you for this. My Comfyui crashed and for some reason trying to reinstall ltxv kept failing. You mentioning a fix by changing code in the diffusers library allowed me to let chatgpt fix it for me in the same way.