Issue when training on custom Dataset.

[FOD-UNOmaha]

I am attempting to train this SSD implementation using a custom dataset. However, I consistently get this issue and I have not yet found the cause:

----------------------------------------------------------------------Epoch: 0----------------------------------------------------------------------

lr warmup...
Traceback (most recent call last):
File "train.py", line 285, in
train()
File "train.py", line 180, in train
for images, targets in data_loader: # load train data
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 345, in next
data = self._next_data()
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 856, in _next_data
return self._process_data(data)
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 881, in _process_data
data.reraise()
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/_utils.py", line 394, in reraise
raise self.exc_type(msg)
IndexError: Caught IndexError in DataLoader worker process 0.
Original Traceback (most recent call last):
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/utils/data/_utils/worker.py", line 178, in _worker_loop
data = fetcher.fetch(index)
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/utils/data/_utils/fetch.py", line 44, in fetch
data = [self.dataset[idx] for idx in possibly_batched_index]
File "/home/travism/anaconda3/lib/python3.7/site-packages/torch/utils/data/_utils/fetch.py", line 44, in
data = [self.dataset[idx] for idx in possibly_batched_index]
File "/home/travism/python/SSD.Pytorch/data/voc0712.py", line 110, in getitem
im, gt, h, w = self.pull_item(index)
File "/home/travism/python/SSD.Pytorch/data/voc0712.py", line 129, in pull_item
img, boxes, labels = self.transform(img, target[:, :4], target[:, 4])
IndexError: too many indices for array: array is 1-dimensional, but 2 were indexed

Do you have any insights to the cause of this issue? Occasionally the code successfully performs 1 or 2 iterations, but consistently fails with this error.

Thanks so much!