Can't Start InvokeAi After Trying To Get Update On ForgeAi

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Can't Start InvokeAi After Trying to Get Update on ForgeAi: A Step-by-Step Guide to Troubleshooting

What Happened?

Have you ever encountered an issue where you can't start InvokeAi after trying to update ForgeAi? This problem can be frustrating, especially if you've been using InvokeAi for a long time without any issues. In this article, we'll walk you through the steps to troubleshoot and resolve this problem.

Steps to Reproduce

To reproduce this issue, follow these steps:

  1. Open Stability Matrix: Launch the Stability Matrix application on your Windows system.
  2. Go to Package Page: Navigate to the package page where you have InvokeAi installed.
  3. Launch InvokeAi: Attempt to launch InvokeAi from the package page.
  4. Get an Error Instead of Launch: Instead of launching InvokeAi, you'll encounter an error message.

Relevant Logs

The error message you'll encounter is accompanied by a log file that provides valuable information about the issue. Here's an excerpt from the log file:

[2025-05-22 21:58:30,130]::[InvokeAI]::INFO --> Using torch device: CPU
The installed version of bitsandbytes was compiled without GPU support. 8-bit optimizers, 8-bit multiplication, and GPU quantization are unavailable.
WARNING[XFORMERS]: xFormers can't load C++/CUDA extensions. xFormers was built for:
    PyTorch 2.7.0+cu126 with CUDA 1206 (you have 2.7.0+cpu)
    Python  3.10.11 (you have 3.10.11)
  Please reinstall xformers (see https://github.com/facebookresearch/xformers#installing-xformers)
  Memory-efficient attention, SwiGLU, sparse and more won't be available.
  Set XFORMERS_MORE_DETAILS=1 for more details
Traceback (most recent call last):
  File "<string>", line 3, in <module>
  File "C:\Ai Arts\StabilityMatrix-win-x64\Data\Packages\InvokeAI\invokeai\app\run_app.py", line 57, in run_app
    apply_monkeypatches()
  File "C:\Ai Arts\StabilityMatrix-win-x64\Data\Packages\InvokeAI\invokeai\app\util\startup_utils.py", line 66, in apply_monkeypatches
    import invokeai.backend.util.hotfixes  # noqa: F401 (monkeypatching on import)
  File "C:\Ai Arts\StabilityMatrix-win-x64\Data\Packages\InvokeAI\invokeai\backend\util\hotfixes.py", line 7, in <module>
    from diffusers.models.attention_processor import AttentionProcessor, AttnProcessor
  File "C:\Ai Arts\StabilityMatrix-win-x64\Data\Packages\InvokeAI\venv\lib\site-packages\diffusers\models\attention_processor.py", line 35, in <module>
    import xformers.ops
  File "C:\Ai Arts\StabilityMatrix-win-x64\Data\Packages\InvokeAI\venv\lib\site-packages\xformers\ops\__init__.py", line 9, in <module>
    from .fmha import (
  File "C:\Ai Arts\StMatrix-win-x64\Data\Packages\InvokeAI\venv\lib\site-packages\xformers\ops\fmha\__init__.py", line 10, in <module>
    from . import (
  File "C:\Ai Arts\StabilityMatrix-win-x64\Data\Packages\InvokeAI\venv\lib\site-packages\xformers\ops\fmha\flash.py", line 55, in <module>
    from ... import _C_flashattention  # type: ignore[attr-defined]
ImportError: DLL load failed while importing _C_flashattention: The specified module was not found.

Version

The version of InvokeAi you're using is 2.14.11.

What Operating System are you using?

You're using Windows as your operating system.

Troubleshooting Steps

To troubleshoot and resolve this issue, follow these steps:

Step 1: Check for Updates

Ensure that your ForgeAi and InvokeAi packages are up-to-date. You can check for updates by navigating to the package page and clicking on the "Update" button.

Step 2: Reinstall xFormers

The error message indicates that xFormers is not installed correctly. To resolve this issue, reinstall xFormers by following the instructions on the GitHub page: https://github.com/facebookresearch/xformers#installing-xformers

Step 3: Check for Conflicting Packages

Conflicting packages can cause issues with InvokeAi. Check for any conflicting packages and uninstall them if necessary.

Step 4: Reset InvokeAi

Resetting InvokeAi can resolve issues related to corrupted settings or cache. To reset InvokeAi, navigate to the package page and click on the "Reset" button.

Step 5: Reinstall InvokeAi

If none of the above steps resolve the issue, try reinstalling InvokeAi from scratch.

Conclusion

In this article, we've walked you through the steps to troubleshoot and resolve the issue of not being able to start InvokeAi after trying to update ForgeAi. By following these steps, you should be able to resolve the issue and get InvokeAi up and running again. If you're still experiencing issues, feel free to reach out to the community for further assistance.
Can't Start InvokeAi After Trying to Get Update on ForgeAi: A Q&A Guide

Q: What is the cause of the issue?

A: The cause of the issue is a combination of factors, including outdated packages, conflicting packages, and incorrect installation of xFormers.

Q: How do I check for updates?

A: To check for updates, navigate to the package page and click on the "Update" button. This will check for any available updates for ForgeAi and InvokeAi.

Q: What is xFormers, and why is it causing issues?

A: xFormers is a library used by InvokeAi for efficient attention processing. However, it seems that xFormers is not installed correctly, causing issues with InvokeAi. To resolve this issue, reinstall xFormers by following the instructions on the GitHub page: https://github.com/facebookresearch/xformers#installing-xformers

Q: How do I reinstall xFormers?

A: To reinstall xFormers, follow these steps:

  1. Uninstall xFormers from your system.
  2. Download the latest version of xFormers from the GitHub page.
  3. Install xFormers using the instructions provided.

Q: What are conflicting packages, and how do I resolve them?

A: Conflicting packages are packages that have the same name or dependencies, causing issues with InvokeAi. To resolve conflicting packages, follow these steps:

  1. Identify the conflicting packages by checking the package page.
  2. Uninstall the conflicting packages.
  3. Reinstall InvokeAi from scratch.

Q: How do I reset InvokeAi?

A: To reset InvokeAi, navigate to the package page and click on the "Reset" button. This will reset InvokeAi to its default settings and cache.

Q: What if none of the above steps resolve the issue?

A: If none of the above steps resolve the issue, try reinstalling InvokeAi from scratch. If you're still experiencing issues, feel free to reach out to the community for further assistance.

Q: Are there any known issues with InvokeAi?

A: Yes, there are known issues with InvokeAi, including issues with xFormers and conflicting packages. However, these issues are being actively addressed by the development team.

Q: How can I stay up-to-date with the latest developments and fixes?

A: To stay up-to-date with the latest developments and fixes, follow the official InvokeAi blog and GitHub page. You can also join the community forums to connect with other users and developers.

Q: Can I get help from the community?

A: Yes, you can get help from the community by joining the community forums. The community is actively engaged and willing to help with any issues you may be experiencing.

Q: What is the best way to troubleshoot the issue?

A: The best way to troubleshoot the issue is to follow the steps outlined in this article. If you're still experiencing issues, try to gather as much information as possible about the issue, including error messages and log files. This will help the community and development team to better understand the issue and provide a solution.