CRITICAL:root:Cannot load caffe2.python. Error: DLL load failed: The specified module could not be found.

[137996047]

❓ Questions and Help

I'm installing into a conda env. it is on Windows 10 . No GPU on machine.
I am following instructions from https://caffe2.ai/docs/getting-started.html?platform=windows&configuration=compile

And the build is success.

Then I copy C:\Users\v-hadong\pytorch\build\caffe2\python\caffe2_pybind11_state.pyd to Python’s DLL folder C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\DLLs\

and then the error is happened as the following picture:

[peterjc123]

You need to copy the DLLs generated by LibTorch in the lib directory, too.

[137996047]

directory
Thank you for your replay, I copy C:\Users\v-hadong\pytorch\build\lib\caffe2_pybind11_state.lib to C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\libs.
But it doesn't work.

[peterjc123]

No, I mean something like torch.dll, c10.dll.

[137996047]

No, I mean something like torch.dll, c10.dll.

I copy all *.dll to C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\libs ,
it doesn't work too.

[137996047]

No, I mean something like torch.dll, c10.dll.

When I run the build.bat, I set BUILD_SHARED_LIBS=ON. Does this matter?

[peterjc123]

Yes, that means the DLLs will be used instead of a complete executable without dependencies.

[peterjc123]

You should copy them to C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\DLLs, not libs.

[137996047]

You should copy them to C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\DLLs, not libs.

I copy torch.dll, c10.dll to C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\DLLs, it doesn't work too.

And I use the dependencies analyse the caffe2_pybind11_state.pyd, it shows:

[peterjc123]

Would you please add C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\DLLs into the environment variable PATH and try again?

[137996047]

Would you please add C:\Users\v-hadong\AppData\Local\Continuum\anaconda2\envs\caffe2\DLLs into the environment variable PATH and try again?

I try do this, it doesn't work too.
And I found python 2.7 dependency is in base env not in the caffe2.

Then I do the same procedures as above in the base env, but it doesn't work too.

[peterjc123]

You'll need to reopen a new CMD window to take that into effect.

[137996047]

You'll need to reopen a new CMD window to take that into effect.

I try it, but doesn't work.

[peterjc123]

I've introduced some methods for dealing with dll loading problems in this post: #20408. You can have a try.