IndexError: list index out of range

[devendraswamy]

File "./tools/trainval_net.py", line 139, in
max_iters=args.max_iters)
File "/content/drive/My Drive/TF-MODEL/tf-faster-rcnn/tools/../lib/model/train_val.py", line 377, in train_net
sw.train_model(sess, max_iters)
File "/content/drive/My Drive/TF-MODEL/tf-faster-rcnn/tools/../lib/model/train_val.py", line 278, in train_model
blobs = self.data_layer.forward()
File "/content/drive/My Drive/TF-MODEL/tf-faster-rcnn/tools/../lib/roi_data_layer/layer.py", line 97, in forward
blobs = self._get_next_minibatch()
File "/content/drive/My Drive/TF-MODEL/tf-faster-rcnn/tools/../lib/roi_data_layer/layer.py", line 92, in _get_next_minibatch
minibatch_db = [self._roidb[i] for i in db_inds]
File "/content/drive/My Drive/TF-MODEL/tf-faster-rcnn/tools/../lib/roi_data_layer/layer.py", line 92, in
minibatch_db = [self._roidb[i] for i in db_inds]
IndexError: list index out of range

please anybody help for this problem.