How to export SLUIntentSlotBPEModel to ONNX 
We don't support export of the SLU model  This issue is stale because it has been open for 30 days with no activity. Remove stale label or comment or this will be closed in 7 days. This issue was closed because it has been inactive for 7 days since being marked as stale.
Hello guys, I'm dealing with this issue for days but still unable to find the key. I have followed export steps as this [link](https://docs.nvidia.com/nemo-framework/user-guide/latest/nemotoolkit/core/export.html). It works for ASR models, but when I need to export SLUIntentSlotBPEModel model, it shows this following error. Have anyone tried to export this model?
```jupyter-notebook
slu_model.export('/home4/khanhlt/nemo_api/onnx/nemo_slu.onnx')
``` 
```
{
	"name": "AttributeError",
	"message": "'SLUIntentSlotBPEModel' object has no attribute 'output_names'",
	"stack": "---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[3], line 1
----> 1 slu_model.export('/home4/khanhlt/nemo_api/onnx/nemo_slu.onnx')

File //home4/khanhlt/slu/Nemo_SLU_2/NeMo/nemo/core/classes/exportable.py:114, in Exportable.export(self, output, input_example, verbose, do_constant_folding, onnx_opset_version, check_trace, dynamic_axes, check_tolerance, export_modules_as_functions, keep_initializers_as_inputs)
    112 model = self.get_export_subnet(subnet_name)
    113 out_name = augment_filename(output, subnet_name)
--> 114 out, descr, out_example = model._export(
    115     out_name,
    116     input_example=input_example,
    117     verbose=verbose,
    118     do_constant_folding=do_constant_folding,
    119     onnx_opset_version=onnx_opset_version,
    120     check_trace=check_trace,
    121     dynamic_axes=dynamic_axes,
    122     check_tolerance=check_tolerance,
    123     export_modules_as_functions=export_modules_as_functions,
    124     keep_initializers_as_inputs=keep_initializers_as_inputs,
    125 )
    126 # Propagate input example (default scenario, may need to be overriden)
    127 if input_example is not None:

File //home4/khanhlt/slu/Nemo_SLU_2/NeMo/nemo/core/classes/exportable.py:191, in Exportable._export(self, output, input_example, verbose, do_constant_folding, onnx_opset_version, check_trace, dynamic_axes, check_tolerance, export_modules_as_functions, keep_initializers_as_inputs)
    189 input_list, input_dict = parse_input_example(input_example)
    190 input_names = self.input_names
--> 191 output_names = self.output_names
    192 output_example = tuple(self.forward(*input_list, **input_dict))
    194 if check_trace:

File ~/miniconda3/envs/nemo/lib/python3.10/site-packages/torch/nn/modules/module.py:1709, in Module.__getattr__(self, name)
   1707     if name in modules:
   1708         return modules[name]
-> 1709 raise AttributeError(f\"'{type(self).__name__}' object has no attribute '{name}'\")

AttributeError: 'SLUIntentSlotBPEModel' object has no attribute 'output_names'"
}

``` 

