TypeError: Fetch argument None has invalid type <class 'NoneType'>

[cvJie]

what happend??how to solve it? thanks
I want to train this model use own datasests,just change the datasetpath,but error is:

2018-11-22 17:13:28.944300: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1423] Adding visible gpu devices: 0
2018-11-22 17:13:29.488915: I tensorflow/core/common_runtime/gpu/gpu_device.cc:911] Device interconnect StreamExecutor with strength 1 edge matrix:
2018-11-22 17:13:29.488996: I tensorflow/core/common_runtime/gpu/gpu_device.cc:917] 0
2018-11-22 17:13:29.489019: I tensorflow/core/common_runtime/gpu/gpu_device.cc:930] 0: N
2018-11-22 17:13:29.489518: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1041] Created TensorFlow device (/job:localhost/replica:0/task:0/device:GPU:0 with 18335 MB memory) -> physical GPU (device: 0, name: Tesla P40, pci bus id: 0000:af:00.0, compute capability: 6.1)
WARNING:tensorflow:Error encountered when serializing regularization_losses.
Type is unsupported, or the types of the items don't match field type in CollectionDef.
'NoneType' object has no attribute 'name'
Running training
training a epoch...
Traceback (most recent call last):
File "train.py", line 519, in
main(parse_arguments(sys.argv[1:]))
File "train.py", line 182, in main
total_loss, train_op, summary_op, summary_writer, regularization_losses, args.learning_rate_schedule_file)
File "train.py", line 248, in train
err, _, step, reg_loss, summary_str = sess.run([loss, train_op, global_step, regularization_losses, summary_op], feed_dict=feed_dict)
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 905, in run
run_metadata_ptr)
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 1125, in _run
self._graph, fetches, feed_dict_tensor, feed_handles=feed_handles)
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 427, in init
self._fetch_mapper = _FetchMapper.for_fetch(fetches)
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 245, in for_fetch
return _ListFetchMapper(fetch)
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 352, in init
self._mappers = [_FetchMapper.for_fetch(fetch) for fetch in fetches]
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 352, in
self._mappers = [_FetchMapper.for_fetch(fetch) for fetch in fetches]
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 245, in for_fetch
return _ListFetchMapper(fetch)
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 352, in init
self._mappers = [_FetchMapper.for_fetch(fetch) for fetch in fetches]
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 352, in
self._mappers = [_FetchMapper.for_fetch(fetch) for fetch in fetches]
File "/opt/anaconda3/lib/python3.6/site-packages/tensorflow/python/client/session.py", line 242, in for_fetch
type(fetch)))
TypeError: Fetch argument None has invalid type <class 'NoneType'>

[lxfantasy]

I also have this problem.Do you resolve this problem?