Francesco_C:

For example it said me to have installed pytorch1.9 (why not 1.8?) in conda evniroment where I have builded it (and I make also “conda list” to check version), but when I make print pytorch version it writes pytorch 1.5…


A source build would currently show 1.9.0a+commit, since it’s the version after the 1.8.0 release and is moving towards 1.9, so that’s expected.
If your environment shows 1.5, then you have most likely installed multiple PyTorch versions in the same environment (via conda, pip, or a source build) and would need to either remove the others or create a new environment and build PyTorch from source there.