Traceback (most recent call last):


 "C:\Users\adnan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\tornado\ioloop.py", line 907, in _run

return self.callback()


 "C:\Users\adnan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\distributed\nanny.py", line 414, in memory_monitor

process = self.process.process
AttributeError: 'NoneType' object has no attribute 'process'

`Traceback (most recent call last):


 "tools/train.py", line 98, in <module>

main()


 "tools/train.py", line 78, in main

train_dataset = build_dataset(cfg.data.train)


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/builder.py", line 32, in build_dataset

dataset = RepeatDataset(build_dataset(cfg['dataset']), cfg['times'])


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/builder.py", line 34, in build_dataset

dataset = _concat_dataset(cfg)


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/builder.py", line 25, in _concat_dataset

datasets.append(build_dataset(data_cfg))


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/builder.py", line 36, in build_dataset

dataset = build_from_cfg(cfg, DATASETS)


 "/home/yangli/jiyuan/mmdetection/mmdet/utils/registry.py", line 74, in build_from_cfg

return obj_type(**args)


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/voc.py", line 14, in __init__

super(VOCDataset, self).__init__(**kwargs)


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/xml_style.py", line 15, in __init__

super(XMLDataset, self).__init__(**kwargs)


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/custom.py", line 63, in __init__

self.img_infos = self.load_annotations(ann_file)


 "/home/yangli/jiyuan/mmdetection/mmdet/datasets/xml_style.py", line 29, in load_annotations

width = int(size.find('width').text)
AttributeError: 'NoneType' object has no attribute 'find'
