[bug]: Model downloads

[kiawizard]

Is there an existing issue for this problem?

• I have searched the existing issues

Install method

Invoke's Launcher

Operating system

Windows

GPU vendor

Nvidia (CUDA)

GPU model

RTX 4060

GPU VRAM

8GB

Version number

v6.9.0

Browser

No response

System Information

{
"version": "6.9.0",
"dependencies": {
"absl-py" : "2.3.1",
"accelerate" : "1.10.1",
"annotated-types" : "0.7.0",
"anyio" : "4.11.0",
"attrs" : "25.4.0",
"bidict" : "0.23.1",
"bitsandbytes" : "0.48.1",
"blake3" : "1.0.8",
"certifi" : "2022.12.7",
"cffi" : "2.0.0",
"charset-normalizer" : "2.1.1",
"click" : "8.3.0",
"colorama" : "0.4.6",
"coloredlogs" : "15.0.1",
"compel" : "2.1.1",
"contourpy" : "1.3.3",
"CUDA" : "12.8",
"cycler" : "0.12.1",
"Deprecated" : "1.2.18",
"diffusers" : "0.33.0",
"dnspython" : "2.8.0",
"dynamicprompts" : "0.31.0",
"einops" : "0.8.1",
"fastapi" : "0.118.3",
"fastapi-events" : "0.12.2",
"filelock" : "3.19.1",
"flatbuffers" : "25.9.23",
"fonttools" : "4.60.1",
"fsspec" : "2025.9.0",
"gguf" : "0.17.1",
"h11" : "0.16.0",
"httptools" : "0.7.1",
"huggingface-hub" : "0.35.3",
"humanfriendly" : "10.0",
"idna" : "3.4",
"importlib_metadata" : "7.1.0",
"InvokeAI" : "6.9.0",
"jax" : "0.7.1",
"jaxlib" : "0.7.1",
"Jinja2" : "3.1.6",
"kiwisolver" : "1.4.9",
"MarkupSafe" : "2.1.5",
"matplotlib" : "3.10.7",
"mediapipe" : "0.10.14",
"ml_dtypes" : "0.5.3",
"mpmath" : "1.3.0",
"networkx" : "3.5",
"numpy" : "1.26.3",
"onnx" : "1.16.1",
"onnxruntime" : "1.19.2",
"opencv-contrib-python": "4.11.0.86",
"opt_einsum" : "3.4.0",
"packaging" : "24.1",
"picklescan" : "0.0.31",
"pillow" : "11.3.0",
"prompt_toolkit" : "3.0.52",
"protobuf" : "4.25.8",
"psutil" : "7.1.0",
"pycparser" : "2.23",
"pydantic" : "2.12.2",
"pydantic-settings" : "2.11.0",
"pydantic_core" : "2.41.4",
"pyparsing" : "3.2.5",
"PyPatchMatch" : "1.0.2",
"pyreadline3" : "3.5.4",
"python-dateutil" : "2.9.0.post0",
"python-dotenv" : "1.1.1",
"python-engineio" : "4.12.3",
"python-multipart" : "0.0.20",
"python-socketio" : "5.14.2",
"PyWavelets" : "1.9.0",
"PyYAML" : "6.0.3",
"regex" : "2025.9.18",
"requests" : "2.28.1",
"safetensors" : "0.6.2",
"scipy" : "1.16.2",
"semver" : "3.0.4",
"sentencepiece" : "0.2.0",
"setuptools" : "70.2.0",
"simple-websocket" : "1.1.0",
"six" : "1.17.0",
"sniffio" : "1.3.1",
"sounddevice" : "0.5.2",
"spandrel" : "0.4.1",
"starlette" : "0.48.0",
"sympy" : "1.14.0",
"tokenizers" : "0.22.1",
"torch" : "2.7.1+cu128",
"torchsde" : "0.2.6",
"torchvision" : "0.22.1+cu128",
"tqdm" : "4.66.5",
"trampoline" : "0.1.2",
"transformers" : "4.57.1",
"typing-inspection" : "0.4.2",
"typing_extensions" : "4.15.0",
"urllib3" : "1.26.13",
"uvicorn" : "0.37.0",
"watchfiles" : "1.1.1",
"wcwidth" : "0.2.14",
"websockets" : "15.0.1",
"wrapt" : "1.17.3",
"wsproto" : "1.2.0",
"zipp" : "3.19.2"
},
"config": {
"schema_version": "4.0.2",
"legacy_models_yaml_path": null,
"host": "127.0.0.1",
"port": 9090,
"allow_origins": [],
"allow_credentials": true,
"allow_methods": [""],
"allow_headers": [""],
"ssl_certfile": null,
"ssl_keyfile": null,
"log_tokenization": false,
"patchmatch": true,
"models_dir": "models",
"convert_cache_dir": "models\.convert_cache",
"download_cache_dir": "models\.download_cache",
"legacy_conf_dir": "configs",
"db_dir": "databases",
"outputs_dir": "outputs",
"custom_nodes_dir": "nodes",
"style_presets_dir": "style_presets",
"workflow_thumbnails_dir": "workflow_thumbnails",
"log_handlers": ["console"],
"log_format": "color",
"log_level": "info",
"log_sql": false,
"log_level_network": "warning",
"use_memory_db": false,
"dev_reload": false,
"profile_graphs": false,
"profile_prefix": null,
"profiles_dir": "profiles",
"max_cache_ram_gb": null,
"max_cache_vram_gb": null,
"log_memory_usage": false,
"device_working_mem_gb": 3,
"enable_partial_loading": false,
"keep_ram_copy_of_weights": true,
"ram": null,
"vram": null,
"lazy_offload": true,
"pytorch_cuda_alloc_conf": null,
"device": "auto",
"precision": "auto",
"sequential_guidance": false,
"attention_type": "auto",
"attention_slice_size": "auto",
"force_tiled_decode": false,
"pil_compress_level": 1,
"max_queue_size": 10000,
"clear_queue_on_startup": false,
"allow_nodes": null,
"deny_nodes": null,
"node_cache_size": 512,
"hashing_algorithm": "blake3_single",
"remote_api_tokens": null,
"scan_models_on_startup": false,
"unsafe_disable_picklescan": false,
"allow_unknown_models": true
},
"set_config_fields": ["legacy_models_yaml_path"]
}

What happened

When I download models (using Starter Bundles), some of the largest ones sometimes reach 100% and then fail with the following error: PermissionError: [WinError 32] The process cannot access the file because it is being used by another p
rocess: 'C:\Tools\InvokeAI\models\tmpinstall_wj51a_8k\flux1-krea-dev-Q4_K_M.gguf'

I suppose it could happen because the internal antivirus in Windows 11 is holding the file for some seconds after the download finishes, and the model_install script has to wait and retry until it succeeds

Complete log:

[2025-10-17 16:37:19,359]::[DownloadQueueService]::INFO --> Download complete: https://huggingface.co/I
nvokeAI/FLUX.1-Krea-dev-GGUF/resolve/main/flux1-krea-dev-Q4_K_M.gguf
[2025-10-17 16:37:19,360]::[ModelInstallService]::INFO --> Model download complete: https://huggingface
.co/InvokeAI/FLUX.1-Krea-dev-GGUF/resolve/main/flux1-krea-dev-Q4_K_M.gguf
[2025-10-17 16:37:19,361]::[ModelInstallService]::INFO --> Model install started: https://huggingface.c
o/InvokeAI/FLUX.1-Krea-dev-GGUF/resolve/main/flux1-krea-dev-Q4_K_M.gguf
Hashing flux1-krea-dev-Q4_K_M.gguf: 0%| | 0/1 [00:00<?, ?file/s][
2025-10-17 16:37:33,506]::[DownloadQueueService]::INFO --> Download complete: https://huggingface.co/un
sloth/FLUX.1-Kontext-dev-GGUF/resolve/main/flux1-kontext-dev-Q4_K_M.gguf
[2025-10-17 16:37:33,506]::[ModelInstallService]::INFO --> Model download complete: https://huggingface
.co/unsloth/FLUX.1-Kontext-dev-GGUF/resolve/main/flux1-kontext-dev-Q4_K_M.gguf
Hashing flux1-krea-dev-Q4_K_M.gguf: 100%|█████████████████████████████| 1/1 [00:17<00:00, 17.58s/file]
[2025-10-17 16:37:40,940]::[ModelInstallService]::ERROR --> Model install error: https://huggingface.co
/InvokeAI/FLUX.1-Krea-dev-GGUF/resolve/main/flux1-krea-dev-Q4_K_M.gguf
PermissionError: [WinError 32] The process cannot access the file because it is being used by another p
rocess: 'C:\Tools\InvokeAI\models\tmpinstall_wj51a_8k\flux1-krea-dev-Q4_K_M.gguf'
Exception in thread Thread-3 (_install_next_item):
Traceback (most recent call last):
File "C:\Users\vanya\AppData\Roaming\uv\python\cpython-3.12.9-windows-x86_64-none\Lib\threading.py",
line 1075, in _bootstrap_inner
self.run()
File "C:\Users\vanya\AppData\Roaming\uv\python\cpython-3.12.9-windows-x86_64-none\Lib\threading.py",
line 1012, in run
self._target(*self._args, **self._kwargs)
File "C:\Tools\InvokeAI.venv\Lib\site-packages\invokeai\app\services\model_install\model_install_def
ault.py", line 524, in _install_next_item
rmtree(job._install_tmpdir)
File "C:\Users\vanya\AppData\Roaming\uv\python\cpython-3.12.9-windows-x86_64-none\Lib\shutil.py", lin
e 781, in rmtree
return _rmtree_unsafe(path, onexc)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\vanya\AppData\Roaming\uv\python\cpython-3.12.9-windows-x86_64-none\Lib\shutil.py", lin
e 635, in _rmtree_unsafe
onexc(os.unlink, fullname, err)
File "C:\Users\vanya\AppData\Roaming\uv\python\cpython-3.12.9-windows-x86_64-none\Lib\shutil.py", lin
e 633, in _rmtree_unsafe
os.unlink(fullname)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another p
rocess: 'C:\Tools\InvokeAI\models\tmpinstall_wj51a_8k\flux1-krea-dev-Q4_K_M.gguf'

What you expected to happen

Models install without issues

How to reproduce the problem

Start the app in Windows 11 25H2, install any Starter Bundle of models

Additional context

No response

Discord username

No response

[kiawizard]

Another similar issue is models downloads reach 100% and stay in this state infinitely, no errors in logs

[kiawizard]

I found out that model file was held by python process.

I exited InvokeAI (python process exited) and after that could move the file from tmpinstall_* folder anywhere.

Then I lanuched InvokeAI again and immediately tried installing the model from a manual location ("URL or Local Path") - it failed without "In-place install" checkbox.

Then I repeated the experiment, launched InvokeAI and installed from Local Path with "In-place install", it hashed the model for several seconds and succeeded

[jacket430]

Can confirm the same issue is happening to me on Windows 11, exact same OS version and steps to reproduce.

[cnqdztp]

Can confirm same issue

[gogurtenjoyer]

This seems to be happening in 6.9.0 on windows only - I filed another issue before noticing this one, that may have more information, linked above.

[jontojek]

Can confirm same issue

[gobshyte]

On Windows 10 I seem to get a BSOD with MEMORY_MANAGEMENT errorcode, if I try to load too many models, or if I try to load a model without opening a fresh instance.

[MatthewMWR]

Same experience here (installing models fails with file in use error). Note that I have tried excluding antivirus, and I have tried monitoring with procmon to see any other processes opening handles. Nothing. Only the invokeai python process is touching the file.
Feels like a timing or logic issue within the python scripts. Self-conflict.
Seems to happen primarily with large model files.
Also, happens regardless of whether using the install starter pack workflow, or the "scan folder" workflow (for cases where I have another copy local). Continues to happen with fresh installations to different folders.

[MatthewMWR]

Maybe some relationship to this big refactor?
#8607

[gobshyte]

I get the BSOD with Scan Folder or loading some SDXL models, and I get the file in use error when loading the Flux Starter Models. Not sure if they are related though.
(By 'Loading' I mean adding to Invoke GUI/hashing whatever else it does, not loading prior to inference.)

[gobshyte]

So I just tried installing flux1-fill-dev.safetensors separately, not via the bundle (one off three that had failed to install...) and the GUI crashes with:

Invoke process exited with code 3221225477

Apparently this is Memory Access Violation

Are there any logs/logging we can increase? I saw options in the settings for logging but have not been able to locate them, or find any mention of their location online?

[RealMonk]

Same issue. Win 11.

[gogurtenjoyer]

@gobshyte your issue is a different one; try the suggestions mentioned here: #8628 (comment) - additionally, make sure that your pagefile isn't set to a manual size ('system managed' should work), and that you've got free space in storage. Otherwise it might be a good idea to make a new issue or post in the above, so that we can focus on the 'file in use' error here.