Not Able to Load unsloth in WIndows

[Prathmesh-1991]

I am trying to run demo notebook on my local machine.
I have installed all the necessary required python library as well as visual studio components as suggested on this [https://docs.unsloth.ai/get-started/installing-+-updating/windows-installation]

But when i am trying to loan unsloth , its is giving me error

ImportError: DLL load failed while importing libtriton: A dynamic link library (DLL) initialization routine failed.

Below is my environment info
OS :- Microsoft Windows 11 Pro
Python:- 3.11
Pytorch : 2.6.0
Cuda :- 12.4

I am using python 3.11 and installed below packages into my virtual environment. [Created virtual environment with venv command].
Using pytorch 2.6.0 with Cuda 12.4
(ocr_env) D:\Custom_OCR\OCR>pip list
Package Version

---

accelerate 1.6.0
aiohappyeyeballs 2.6.1
aiohttp 3.11.18
aiosignal 1.3.2
annotated-types 0.7.0
anyio 4.9.0
asttokens 3.0.0
attrs 25.3.0
bitsandbytes 0.45.5
certifi 2025.1.31
charset-normalizer 3.4.1
colorama 0.4.6
comm 0.2.2
contourpy 1.3.2
cut-cross-entropy 25.1.1
cycler 0.12.1
datasets 3.6.0
debugpy 1.8.14
decorator 5.2.1
dill 0.3.8
diskcache 5.6.3
docstring_parser 0.16
executing 2.2.0
filelock 3.18.0
fonttools 4.57.0
frozenlist 1.6.0
fsspec 2025.3.0
h11 0.16.0
hf_transfer 0.1.9
httpcore 1.0.9
httpx 0.28.1
huggingface-hub 0.31.1
idna 3.10
intel-openmp 2021.4.0
ipykernel 6.29.5
ipython 9.1.0
ipython_pygments_lexers 1.1.1
jedi 0.19.2
Jinja2 3.1.6
jupyter_client 8.6.3
jupyter_core 5.7.2
kiwisolver 1.4.8
llama_cpp_python 0.3.9
markdown-it-py 3.0.0
MarkupSafe 3.0.2
matplotlib 3.10.1
matplotlib-inline 0.1.7
mdurl 0.1.2
mkl 2021.4.0
mpmath 1.3.0
msgspec 0.19.0
multidict 6.4.3
multiprocess 0.70.16
nest-asyncio 1.6.0
networkx 3.4.2
numpy 1.26.4
ollama 0.4.8
opencv-python 4.11.0.86
packaging 25.0
pandas 2.2.3
parso 0.8.4
pdf2image 1.17.0
peft 0.12.0
pillow 11.2.1
pip 25.1.1
platformdirs 4.3.7
prompt_toolkit 3.0.51
propcache 0.3.1
protobuf 3.20.3
psutil 7.0.0
pure_eval 0.2.3
py-cpuinfo 9.0.0
pyarrow 20.0.0
pydantic 2.11.4
pydantic_core 2.33.2
Pygments 2.19.1
PyMuPDF 1.25.5
pyparsing 3.2.3
PyPDF2 3.0.1
python-dateutil 2.9.0.post0
pytz 2025.2
pywin32 310
PyYAML 6.0.2
pyzbar 0.1.9
pyzmq 26.4.0
qrdet 2.5
qreader 3.16
quadrilateral-fitter 1.12
regex 2024.11.6
requests 2.32.3
rich 14.0.0
safetensors 0.5.3
scipy 1.15.2
seaborn 0.13.2
sentencepiece 0.2.0
setuptools 65.5.0
shapely 2.1.0
shtab 1.7.2
six 1.17.0
sniffio 1.3.1
stack-data 0.6.3
sympy 1.13.1
tbb 2021.13.1
timm 1.0.15
tokenizers 0.21.1
torch 2.6.0+cu124
torchaudio 2.6.0+cu124
torchvision 0.21.0+cu124
tornado 6.4.2
tqdm 4.67.1
traitlets 5.14.3
transformers 4.51.3
triton-windows 3.3.0.post19
trl 0.15.2
typeguard 4.4.2
typing_extensions 4.13.2
typing-inspection 0.4.0
tyro 0.9.20
tzdata 2025.2
ultralytics 8.3.119
ultralytics-thop 2.0.14
unsloth 2025.5.4
unsloth_zoo 2025.5.6
urllib3 2.4.0
wcwidth 0.2.13
wheel 0.45.1
xformers 0.0.29.post3
xxhash 3.5.0
yarl 1.20.0

Below is complete error

ImportError Traceback (most recent call last)
Cell In[1], line 1
----> 1 from unsloth import FastLanguageModel
2 import torch

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\unsloth_init_.py:163
158 pass
161 # For Gradio HF Spaces?
162 # if "SPACE_AUTHOR_NAME" not in os.environ and "SPACE_REPO_NAME" not in os.environ:
--> 163 import triton
164 if DEVICE_TYPE == "cuda":
165 libcuda_dirs = lambda: None

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton_init_.py:8
2 version = '3.3.0'
4 # ---------------------------------------
5 # Note: import order is significant here.
6
7 # submodules
----> 8 from .runtime import (
9 autotune,
10 Config,
11 heuristics,
12 JITFunction,
13 KernelInterface,
14 reinterpret,
15 TensorWrapper,
16 OutOfResources,
17 InterpreterError,
18 MockTensor,
19 )
20 from .runtime.jit import jit
21 from .compiler import compile, CompilationError

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\runtime_init_.py:1
----> 1 from .autotuner import (Autotuner, Config, Heuristics, autotune, heuristics)
2 from .cache import RedisRemoteCacheBackend, RemoteCacheBackend
3 from .driver import driver

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\runtime\autotuner.py:9
6 import inspect
7 from typing import Dict, Tuple, List, Optional
----> 9 from .jit import KernelInterface
10 from .errors import OutOfResources, PTXASError
11 from .driver import driver

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\runtime\jit.py:12
10 from functools import cached_property
11 from typing import Callable, Generic, Iterable, Optional, TypeVar, Union, overload, Dict, Any, Tuple
---> 12 from ..runtime.driver import driver
13 from types import ModuleType
14 from .._utils import find_paths_if, get_iterable_path

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\runtime\driver.py:1
----> 1 from ..backends import backends
2 from ..backends import DriverBase
5 def _create_driver():

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\backends_init_.py:50
45 backends[name] = Backend(_find_concrete_subclasses(compiler, BaseBackend),
46 _find_concrete_subclasses(driver, DriverBase))
47 return backends
---> 50 backends = _discover_backends()

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\backends_init_.py:43, in _discover_backends()
41 if name.startswith('__'):
42 continue
---> 43 compiler = _load_module(name, os.path.join(root, name, 'compiler.py'))
44 driver = _load_module(name, os.path.join(root, name, 'driver.py'))
45 backends[name] = Backend(_find_concrete_subclasses(compiler, BaseBackend),
46 _find_concrete_subclasses(driver, DriverBase))

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\backends_init_.py:12, in _load_module(name, path)
10 spec = importlib.util.spec_from_file_location(name, path)
11 module = importlib.util.module_from_spec(spec)
---> 12 spec.loader.exec_module(module)
13 return module

File d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton\backends\amd\compiler.py:2
1 from triton.backends.compiler import BaseBackend, GPUTarget
----> 2 from triton._C.libtriton import ir, passes, llvm, amd
3 from dataclasses import dataclass
4 from typing import Any, Dict, Tuple

ImportError: DLL load failed while importing libtriton: A dynamic link library (DLL) initialization routine failed.

Anyone have faced this issue and any suggestion

[thad0ctor]

I had issues with triton-windows and just gave up and used WSL and a linux dual boot instead. I think unsloth works natively with triton (linux only) and requires a degree of patching to get things patched with tritin-windows. Conceptually it should work (maybe?) but I was never successful.

I'd just throw your logs into chatGPT, mine said this:

3. ✅ Set Required Environment Variables
   Sometimes, Windows needs help finding DLLs for Triton. Add this to the top of your script before importing anything from Unsloth:

python
Copy
Edit
import os
triton_bin_path = r"d:\Custom_OCR\OCR\ocr_env\Lib\site-packages\triton_C"
os.environ["PATH"] += os.pathsep + triton_bin_path

But you'll want to find where the triton-windows dlls are first and set symlinks too if needed.