windoman commented on issue #14548: mx.viz.plot_network KeyError: 'ctc_loss0_output' URL: https://github.com/apache/incubator-mxnet/issues/14548#issuecomment-480593166 > @windoman sorry for the late reply. The index comes from that ctc_loss op is set to return more than one output: https://github.com/apache/incubator-mxnet/blob/master/src/operator/nn/ctc_loss.cc#L103 Thank you very much for your reply. The `ctc_loss` have two outputs, a loss symbol for per sample in batch and gradient output, which are accounted [https://github.com/apache/incubator-mxnet/blob/master/src/operator/nn/ctc_loss.cc#L105](https://github.com/apache/incubator-mxnet/blob/master/src/operator/nn/ctc_loss.cc#L105), but only one output is visible [https://github.com/apache/incubator-mxnet/blob/master/src/operator/nn/ctc_loss.cc#L109](https://github.com/apache/incubator-mxnet/blob/master/src/operator/nn/ctc_loss.cc#L109).
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