IndexError: list index out of range

[why228430]

when I run "sh rtools/train.sh",I meet the error. How I can do to solve the problem?
2020-10-17 10:25:11,392 - mmdet - INFO - Saving checkpoint at 1 epochs
completed: 0, elapsed: 0sTraceback (most recent call last):
File "tools/train.py", line 161, in
main()
File "tools/train.py", line 157, in main
meta=meta)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmdet-2.1.0+8f3868f-py3.7-linux-x86_64.egg/mmdet/apis/train.py", line 179, in train_detector
runner.run(data_loaders, cfg.workflow, cfg.total_epochs)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmcv/runner/epoch_based_runner.py", line 122, in run
epoch_runner(data_loaders[i], **kwargs)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmcv/runner/epoch_based_runner.py", line 46, in train
self.call_hook('after_train_epoch')
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmcv/runner/base_runner.py", line 282, in call_hook
getattr(hook, fn_name)(self)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmdet-2.1.0+8f3868f-py3.7-linux-x86_64.egg/mmdet/core/evaluation/eval_hooks.py", line 28, in after_train_epoch
self.evaluate(runner, results)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmdet-2.1.0+8f3868f-py3.7-linux-x86_64.egg/mmdet/core/evaluation/eval_hooks.py", line 32, in evaluate
results, logger=runner.logger, **self.eval_kwargs)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmdet-2.1.0+8f3868f-py3.7-linux-x86_64.egg/mmdet/datasets/dotav1.py", line 187, in evaluate
logger=logger)
File "/home/dl/anaconda3/lib/python3.7/site-packages/mmdet-2.1.0+8f3868f-py3.7-linux-x86_64.egg/mmdet/core/evaluation/rmean_ap.py", line 196, in reval_map
num_classes = len(det_results[0]) # positive class num
IndexError: list index out of range

[houliping]

Have you solved this problem?

[seacloud-0420]

Hi,@why228430
I also encountered this problem. Have you solved your problem?

[PuyangChen]

I also encountered this problem. And I have checked the class num repeatedly. Have you solved your problem?

[tjmannn]

same problem, i met this when just finishing the first epoch

[PuyangChen]

same problem, i met this when just finishing the first epoch

I met the same problem before. Now, I have already fixed it.

Error: num_classes = len(det_results[0]) # positive class num

My problem is due to the det_results is an empty list, because the test.txt is empty. After training the first epoch, there are no data to validate.
So it returns the error: list index out of range.
I hope it could help those who encounter the same problem.

[colorfully-ybf]

In my ieda，it's maybe the error of dataset

[HeHuasu]

same problem, i met this when just finishing the first epoch

I met the same problem before. Now, I have already fixed it.

Error: num_classes = len(det_results[0]) # positive class num

My problem is due to the det_results is an empty list, because the test.txt is empty. After training the first epoch, there are no data to validate. So it returns the error: list index out of range. I hope it could help those who encounter the same problem.

Sorry, I don't quite understand this error. If I want to fix this error, do I need to add the relevant files?