TypeError: Required parameter edge_index is empty.

[LLLLucensus]

I'm not sure whether it is the bug of pytorch_geometric. Any body saw the same error?

m1=self.propagate(edge_index1,size=(x1.size(0), x1.size(0)), x=x1,edge_weight=edge_weight1) File "/opt/conda/lib/python3.7/site-packages/torch_geometric/nn/conv/message_passing.py", line 257, in propagate msg_kwargs = self.distribute(self.msg_params, kwargs) File "/opt/conda/lib/python3.7/site-packages/torch_geometric/nn/conv/message_passing.py", line 180, in distribute raise TypeError(f'Required parameter {key} is empty.') TypeError: Required parameter edge_index is empty.