__ext.so error: undefined symbol: __cudaRegisterFatBinaryEnd

[RonDen]

Hi, I have encountered the same problems mentioned in this issue.
Can you give me some detail on how to solve this?

I have tried to create a new conda evironment with python=3.5, torch==0.4, and successfully build the bn.o and __ext.so files.
But when I use command python test, I got the same error.
I tried to delete the __ext.so file and rebuild, but the same error again and again.

What you mean about the multiple environments, and how to clean the environment?

[aPlutoBoy]

Hi, I have faced the same error and I finally find that this is mainly because the version of CUDA and your torch are not match. As for me, using torch==0.4.1 and cuda = 9.0 is fine.