KeyError at 317, eval.py

python eval.py
Then it can work well like below:

Finished loading model!
im_detect: 1/4952 1.888s
im_detect: 2/4952 0.145s
...

Evaluating detections
Writing aeroplane VOC results file
Writing bicycle VOC results file
...

VOC07 metric? Yes

But after that, it will error:

Exception has occurred: KeyError at 317, eval.py
R = class_recs[image_ids[d]]

And here:

class_recs
{}

image_ids
['000002', '000002', '000002', '000002', '000002', '000002', '000003']

d
0

Do you know what here happening and can you help me?

Similar problem. #482 (comment)