tensorflow.python.framework.errors_impl.NotFoundError: Unsuccessful TensorSliceReader constructor: Failed to find any matching files for /a-a/model.ckpt

Wed Jun 20 02:20:57 2018[1,0]<stderr>:Traceback (most recent call last):
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/data/script/tensorflow-models/tensorflow_models/research/object_detection/train.py", line 211, in <module>
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    tf.app.run()
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/platform/app.py", line 48, in run
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    _sys.exit(main(_sys.argv[:1] + flags_passthrough))
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/data/script/tensorflow-models/tensorflow_models/research/object_detection/train.py", line 207, in main
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    worker_job_name, is_chief, FLAGS.train_dir)
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/data/script/tensorflow-models/tensorflow_models/research/object_detection/trainer.py", line 246, in train
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    var_map, train_config.fine_tune_checkpoint))
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/data/script/tensorflow-models/tensorflow_models/research/object_detection/utils/variables_helper.py", line 122, in get_variables_available_in_checkpoint
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    ckpt_reader = tf.train.NewCheckpointReader(checkpoint_path)
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 150, in NewCheckpointReader
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    return CheckpointReader(compat.as_bytes(filepattern), status)
Wed Jun 20 02:20:57 2018[1,0]<stderr>:  File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/errors_impl.py", line 473, in __exit__
Wed Jun 20 02:20:57 2018[1,0]<stderr>:    c_api.TF_GetCode(self.status.status))
Wed Jun 20 02:20:57 2018[1,0]<stderr>:tensorflow.python.framework.errors_impl.NotFoundError: Unsuccessful TensorSliceReader constructor: Failed to find any matching files for /a-a/model.ckpt