Getting Error while converting the frozen model to web version.....

[sandhyacs]

input node: Const
ouput node: num_detections

[<tf.Tensor 'prefix/Const:0' shape=(2,) dtype=float32>, <tf.Tensor 'prefix/image_tensor:0' shape=(?, ?, ?, 3) dtype=uint8>,.................................................................................................................................................................................................................
<tf.Operation 'prefix/detection_classes' type=Identity>, <tf.Operation 'prefix/num_detections' type=Identity>]

Command:
python -m quantize_graph --input=./exportedModel/optimized_graph.pb --outpu
t=rounded_graph.pb --output_node_names='num_detections' --mode=weights_rounded

Error::::

Traceback (most recent call last):
File "C:\Users\Admin\AppData\Local\conda\conda\envs\tf\lib\site-packages\tensorflow\python\framework\importer.py", line 4
18, in import_graph_def
graph._c_graph, serialized, options) # pylint: disable=protected-access
tensorflow.python.framework.errors_impl.InvalidArgumentError: NodeDef expected inputs '' do not match 1 inputs specified; O
p<name=Const; signature= -> output:dtype; attr=value:tensor; attr=dtype:type>; NodeDef: {{node Preprocessor/map/while/add/y
}} = Constdtype=DT_INT32, value=Tensor<type: int32 shape: [] values: 1>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\Admin\AppData\Local\conda\conda\envs\tf\lib\runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "C:\Users\Admin\AppData\Local\conda\conda\envs\tf\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Users\Admin\pocketbotanist-master\python\quantize_graph.py", line 1302, in
app.run()
File "C:\Users\Admin\AppData\Local\conda\conda\envs\tf\lib\site-packages\tensorflow\python\platform\app.py", line 125, in
run
_sys.exit(main(argv))
File "C:\Users\Admin\pocketbotanist-master\python\quantize_graph.py", line 1273, in main
importer.import_graph_def(tf_graph, input_map={}, name="")
File "C:\Users\Admin\AppData\Local\conda\conda\envs\tf\lib\site-packages\tensorflow\python\util\deprecation.py", line 488
, in new_func
return func(*args, **kwargs)
File "C:\Users\Admin\AppData\Local\conda\conda\envs\tf\lib\site-packages\tensorflow\python\framework\importer.py", line 4
22, in import_graph_def
raise ValueError(str(e))
ValueError: NodeDef expected inputs '' do not match 1 inputs specified; Op<name=Const; signature= -> output:dtype; attr=val
ue:tensor; attr=dtype:type>; NodeDef: {{node Preprocessor/map/while/add/y}} = Constdtype=DT_INT32, value=Tensor<type: int3
2 shape: [] values: 1>

I am getting above error please tell me the solution if possible........