EOFError: Ran out of input

I got an error during training, as you can see in the code below 

```
     91         with open(scene_pt_path, 'rb') as f:
     92             print(f)
---> 93             conn_matrixes = pickle.load(f)
     94             print(f)
     95             edge_matrixes = pickle.load(f)

EOFError: Ran out of input
```