from mpi4py import MPI ImportError: DLL load failed: 找不到指定的模块。

[TreeB-450]

i completely followed the installation, Step1-3, then pip install xuanpolicy[torch], but when i import xuanpolicy, it came to "from mpi4py import MPI " and error "ImportError: DLL load failed: 找不到指定的模块。", What's going on ?

[wenzhangliu]

Hi, can you tell me which operating system did you use to install xuanpolicy？

[TreeB-450]

Hi, can you tell me which operating system did you use to install xuanpolicy？

win10

[wenzhangliu]

You can try to install an MPI program from here. Then, reinstall mpi4py： pip uninstall mpi4py pip install mpi4py

[TreeB-450]

You can try to install an MPI program from here. Then, reinstall mpi4py： pip uninstall mpi4py pip install mpi4py no, it didn't work. a new error appear "OSError: [WinError 126] 找不到指定的模块。"

[wenzhangliu]

This link shows a similar issue to yours, hope it will be useful.

[blog666]

按照上述博客方法复制magent.dll到指定文件夹后，还会出现这个错误

[suishenxiafan]

Because the software MPI is missing in your PC. For windows system, you can download [msmpisetup.exe] from link https://www.microsoft.com/en-us/download/details.aspx?id=57467 and install it. Then it works.