Error in resnet_train.py

[Farihaa]

I have been running inference with small number of images and then training; code only runs for one step and then breaks with following error:

step 0, loss = 1.13 (14.0 examples/sec; 0.642 sec/batch)
Traceback (most recent call last):

File "", line 1, in
runfile('C:/Users/Fariha/Desktop/MS/CervCancer/tensorflow-resnet-master/wth.py', wdir='C:/Users/Fariha/Desktop/MS/CervCancer/tensorflow-resnet-master')

File "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\spyder\utils\site\sitecustomize.py", line 710, in runfile
execfile(filename, namespace)

File "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\spyder\utils\site\sitecustomize.py", line 101, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)

File "C:/Users/Fariha/Desktop/MS/CervCancer/tensorflow-resnet-master/wth.py", line 76, in
image_tensor = sess.run(error)

File "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 789, in run
run_metadata_ptr)

File "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 984, in _run
self._graph, fetches, feed_dict_string, feed_handles=feed_handles)

File "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 410, in init
self._fetch_mapper = _FetchMapper.for_fetch(fetches)

File "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 227, in for_fetch
(fetch, type(fetch)))

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

INFO:tensorflow:Error reported to Coordinator: <class 'tensorflow.python.framework.errors_impl.CancelledError'>, Run call was cancelled