Problem with the YOLOV3 - ValueError: not enough values to unpack (expected 3, got 0)

I create the detection model with yolov3.
But , I have this erro.
ValueError: not enough values to unpack (expected 3, got 0)
Please can you help me ?

Without code we can only make vague guesses what’s going on here.

If there’s something incorrect, then it is related to the caching mechanism. Your cache for some reason is an empty dict.

Thanks for your feedback but i found my error.
If your labels have a negative values (-1) then we change this negative value to 0.

I that, every person use the yolo3 for the detection model, you don’t have the negative labels.
Thanks