Problems with training

[cattyhubby]

Set proposal method: gt
Appending horizontally-flipped training examples...
wrote gt roidb to /home/yang/Documents/Collaborative-Learning-for-Weakly-Supervised-Object-Detection-master/data/cache/voc_2007_trainval_gt_roidb.pkl
Traceback (most recent call last):
File "./tools/trainval_net.py", line 114, in
imdb, roidb = combined_roidb(args.imdb_name)
File "./tools/trainval_net.py", line 80, in combined_roidb
roidbs = [get_roidb(s) for s in imdb_names.split('+')]
File "./tools/trainval_net.py", line 80, in
roidbs = [get_roidb(s) for s in imdb_names.split('+')]
File "./tools/trainval_net.py", line 77, in get_roidb
roidb = get_training_roidb(imdb)
File "/home/yang/Documents/Collaborative-Learning-for-Weakly-Supervised-Object-Detection-master/tools/../lib/model/train_val.py", line 319, in get_training_roidb
imdb.append_flipped_images()
File "/home/yang/Documents/Collaborative-Learning-for-Weakly-Supervised-Object-Detection-master/tools/../lib/datasets/imdb.py", line 125, in append_flipped_images
boxes = self.roidb[i]['boxes'].copy()
KeyError: 'boxes'
Command exited with non-zero status 1
2.04user 2.67system 0:01.48elapsed 318%CPU (0avgtext+0avgdata 190308maxresident)k
0inputs+1128outputs (0major+33861minor)pagefaults 0swaps