onnx.onnx_cpp2py_export.checker.ValidationError: Node () has input size 1 not in range [min=2, max=3].

Hi all~

I’m converting a pytorch model to an onnx model. The convert process doesn’t report any error or warning. But when I check the onnx model, using this function:

onnx.checker.check_model(model)

I get the following error:

onnx.onnx_cpp2py_export.checker.ValidationError: Node () has input size 1 not in range [min=2, max=3].

==> Context: Bad node spec: input: "626" output: "634" op_type: "Pad" attribute { name: "mode" s: "constant" type: STRING } attribute { name: "pads" ints: 0 ints: 0 ints: 1 ints: 1 ints: 0 ints: 0 ints: 1 ints: 1 type: INTS } attribute { name: "value" f: 0 type: FLOAT }

Can anyone help me? Thank you very much!