RuntimeError: log/sem_seg/pointnet2_sem_seg//checkpoints/best_model.pth is a zip archive (did you mean to use torch.jit.load()?)

This error message suggests that the PyTorch model checkpoint file 'best_model.pth' is a zip archive, which is not the expected format for loading a PyTorch model checkpoint. The error message also suggests using 'torch.jit.load()' instead of the current method of loading the model checkpoint.

To resolve this issue, you can try using 'torch.jit.load()' to load the model checkpoint. This function is specifically designed for loading PyTorch models that have been serialized using the JIT compiler. Here's an example of how you can use 'torch.jit.load()' to load a model checkpoint:

import torch

# Specify the path to the model checkpoint file
model_path = 'log/sem_seg/pointnet2_sem_seg/checkpoints/best_model.pth'

# Load the model checkpoint using torch.jit.load()
model = torch.jit.load(model_path)

# Use the loaded model for inference or further training

Note that you may need to adjust the code above depending on the specifics of your application and the structure of your model checkpoint file.