Gregório Fornetti Azevedo

### Checklist - [x] I have searched for [similar issues](https://github.com/isl-org/Open3D-ML/issues). - [x] I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip). - [x] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the...

In the README of the repository, the third command to execute to train the model is the following: `python train.py --cfg_file ./cfgs/predictor_masked_bn_tune.yaml --extra_tag predictor_tune --ckpt ../output/cfgs/predictor/default/ckpt/latest_model.pth --hard_drop` I tried to...