Nengzhong Yin

@csuhan i have the similar prombles too , i try to run inference with cuda:4 but there is the same error. 

@DangChuong-DC i tried , but there is a new error.... but thanks 

@csuhan thanks    i try to change some code in other place and it works correctly.

> i have the same problems does spconv1.x work on Querydet? yes,i use spconv1.x and the codes work well.

> but when i install spconv1.x, some problems have bothered me a lot . when i try to use` python setup.py bdist_wheel` it always has the problem , can you...

> how about your cmake version 3.18.0-rc1