lostella commented on issue #12795: Deserialization problem with gluon `ValueError: There are multiple outputs with name ...` URL: https://github.com/apache/incubator-mxnet/issues/12795#issuecomment-429003322 Looks like the problem occurs with `Dense` as well, so the issue probably lies in the `+`: ``` import mxnet as mx class MyBlock(mx.gluon.HybridBlock): def __init__(self): super().__init__() with self.name_scope(): self.model = mx.gluon.nn.Dense(units=5) def hybrid_forward(self, F, x, y): return self.model(x) + self.model(y) block = MyBlock() block.initialize() block.hybridize() output = block(mx.nd.random_normal(shape=(100,)), mx.nd.random_normal(shape=(100,))) block.export(path="./model", epoch=0) symbol = mx.gluon.SymbolBlock.imports( symbol_file="./model-symbol.json", input_names=["data0", "data1"], param_file="./model-0000.params", ctx=mx.Context.default_ctx ) ``` gives ``` Traceback (most recent call last): File "2018-10-11-very-weird-issue.py", line 23, in <module> ctx=mx.Context.default_ctx File "[...]/lib/python3.6/site-packages/mxnet/gluon/block.py", line 1023, in imports ret = SymbolBlock(sym, inputs) File "[...]/lib/python3.6/site-packages/mxnet/gluon/block.py", line 1051, in __init__ for j in i.get_internals(): File "[...]/lib/python3.6/site-packages/mxnet/symbol/symbol.py", line 93, in <genexpr> return (self[i] for i in self.list_outputs()) File "[...]/lib/python3.6/site-packages/mxnet/symbol/symbol.py", line 517, in __getitem__ raise ValueError('There are multiple outputs with name \"%s\"' % index) ValueError: There are multiple outputs with name "myblock0_dense0_fwd_output" ```
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