ZeroDivisionError: float division by zero

[joaoalves10]

Hi, i am implementing this repository to my data set. I have already done all steps without any error until the trainning.
When i run the train.py, i have received 2 errors in differents runs:

1. i have this error after the last epoch is completed:
   Traceback (most recent call last):
   File "/media/ciafa/toshiba_2tb_1/Yolo_repositorio/custom_yolov3/train.py", line 305, in
   main(args)
   File "/media/ciafa/toshiba_2tb_1/Yolo_repositorio/custom_yolov3/train.py", line 293, in main
   average_precisions = evaluate(infer_model, valid_generator)
   File "/media/ciafa/toshiba_2tb_1/Yolo_repositorio/custom_yolov3/utils/utils.py", line 48, in evaluate
   pred_boxes = get_yolo_boxes(model, raw_image, net_h, net_w, generator.get_anchors(), obj_thresh, nms_thresh)[0]
   File "/media/ciafa/toshiba_2tb_1/Yolo_repositorio/custom_yolov3/utils/utils.py", line 259, in get_yolo_boxes
   do_nms(boxes, nms_thresh)
   File "/media/ciafa/toshiba_2tb_1/Yolo_repositorio/custom_yolov3/utils/utils.py", line 166, in do_nms
   if bbox_iou(boxes[index_i], boxes[index_j]) >= nms_thresh:
   File "/media/ciafa/toshiba_2tb_1/Yolo_repositorio/custom_yolov3/utils/bbox.py", line 57, in bbox_iou
   return float(intersect) / union
   ZeroDivisionError: float division by zero

2. The second issue is that the train in completed and the wieghts.h5 file is generated. However, in the end of the train, the mAP equals 0. I found it to be a little bit strange, so i ran the predict.py to confirm if the weights.h5 file was correctly generated, but it does no work, it gives me the same error showed in 1.

Can anyone help me with this issue?