Programming has become quite simple compared to earlier when lower-level languages like Assembly used to be the norm. That said, random bugs and glitches are still the order of the day when working ...

looks like compiler,i.e. g++ hasn't find .o file ,probably due to the unsuccessful build of mmcv code,which only offers cuda file to be built to make .o file.Maybe check if build of mmcv is successful ...

Hi, Thank you for reporting this, is it possible to share a small reproducer to illustrate the issue?