Error saving the model

[akmahaja]

I am using the same code as in the AttentionModel in keras_models.py. I have added the additional Dense Layers in the end. When I try to save the model, it throws the following issue: The code that is throwing this issue is here: keras-team/keras#2659

File "trainer.py", line 48, in create_training_features
json_string = explicit_model.to_json()
File "/usr/local/lib/python2.7/site-packages/keras/engine/topology.py", line 2368, in to_json
config = self.get_config()
File "/usr/local/lib/python2.7/site-packages/keras/engine/topology.py", line 2163, in get_config
new_node_index = node_conversion_map[node_key]
KeyError: 'input1_ib-0'