Win11 64位环境下YOLOv7启动报错：_fblas加载DLL失败

问题场景 #

• 系统：Windows 11 64位
• Python版本：3.9（更换其他版本后问题仍存在）
• 环境：通过Anaconda安装YOLOv7全部依赖包
• 触发时机：启动train.py开始训练时抛出导入错误
• 核心报错：ImportError: DLL load failed while importing _fblas: %1 不是有效的 Win32 应用程序

完整报错堆栈：

Traceback (most recent call last):
  File "C:\Users\iirof\PycharmProjects\rf_detect_mob\yolov7-custom\train.py", line 24, in <module>
    import test  # import test.py to get mAP after each epoch
  File "C:\Users\iirof\PycharmProjects\rf_detect_mob\yolov7-custom\test.py", line 12, in <module>
    from models.experimental import attempt_load
  File "C:\Users\iirof\PycharmProjects\rf_detect_mob\yolov7-custom\models\experimental.py", line 6, in <module>
    from models.common import Conv, DWConv
  File "C:\Users\iirof\PycharmProjects\rf_detect_mob\yolov7-custom\models\common.py", line 17, in <module>
    from utils.plots import color_list, plot_one_box
  File "C:\Users\iirof\PycharmProjects\rf_detect_mob\yolov7-custom\utils\plots.py", line 19, in <module>
    from scipy.signal import butter, filtfilt
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\signal\__init__.py", line 309, in <module>
    from . import _sigtools, windows
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\signal\windows\__init__.py", line 41, in <module>
    from ._windows import *
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\signal\windows\_windows.py", line 7, in <module>
    from scipy import linalg, special, fft as sp_fft
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\__init__.py", line 233, in __getattr__
    return _importlib.import_module(f'scipy.{name}')
  File "C:\Users\iirof\anaconda3\envs\rf\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\linalg\__init__.py", line 197, in <module>
    from ._misc import *
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\linalg\_misc.py", line 3, in <module>
    from .blas import get_blas_funcs
  File "C:\Users\iirof\anaconda3\envs\rf\lib\site-packages\scipy\linalg\blas.py", line 213, in <module>
    from scipy.linalg import _fblas
ImportError: DLL load failed while importing _fblas: %1 不是有效的 Win32 应用程序。

解决方案 #

1. 确认Anaconda环境架构 #

先检查当前conda环境是否为64位：

conda info

查看输出里的platform字段，必须是win-64。如果是32位，卸载现有Anaconda，重新安装64位版本。

2. 重装适配的scipy包 #

先卸载当前scipy：

pip uninstall scipy -y

用conda重新安装兼容64位Windows的版本：

conda install scipy -c conda-forge

或者指定和Python3.9匹配的具体版本：

conda install scipy=1.7.3 -c conda-forge

3. 清理依赖冲突 #

清理conda缓存，避免残留的32位包：

conda clean --all

然后重新安装YOLOv7依赖：

pip install -r requirements.txt

确保requirements.txt里的包版本都适配64位系统和Python3.9。

4. 补充系统运行库 #

安装scipy依赖的Visual C++运行库：

conda install vs2015_runtime -c conda-forge

5. 重建虚拟环境 #

如果以上方法都无效，直接创建全新的64位虚拟环境：

conda create -n yolov7_env python=3.9 -y
conda activate yolov7_env
pip install -r requirements.txt

内容的提问来源于stack exchange，提问作者Maksim Subbotin