MobileBERT model for Openvino? about pinto_model_zoo

[PINTO0309]

I've already tried and it didn't work.

[metanav]

What was the issue?

[PINTO0309]

https://docs.openvinotoolkit.org/latest/openvino_docs_MO_DG_prepare_model_convert_model_tf_specific_Convert_BERT_From_Tensorflow.html

[ ERROR ]  Cannot infer shapes or values for node "gradients_1/bert/encoder/layer_0/attention/self/MatMul_1_grad/BroadcastGradientArgs".
[ ERROR ]  tf.placeholder() is not compatible with eager execution.
[ ERROR ]  
[ ERROR ]  It can happen due to bug in custom shape infer function <function tf_native_tf_node_infer at 0x7f03e588c510>.
[ ERROR ]  Or because the node inputs have incorrect values/shapes.
[ ERROR ]  Or because input shapes are incorrect (embedded to the model or passed via --input_shape).
[ ERROR ]  Run Model Optimizer with --log_level=DEBUG for more information.
[ ANALYSIS INFO ]  It looks like there is IteratorGetNext as input
Run the Model Optimizer with:
		--input "IteratorGetNext:0[16],IteratorGetNext:1[16 384],IteratorGetNext:2[16 384],IteratorGetNext:3[16 384],IteratorGetNext:4[16]"
And replace all negative values with positive values
[ ERROR ]  Exception occurred during running replacer "REPLACEMENT_ID" (<class 'extensions.middle.PartialInfer.PartialInfer'>): Stopped shape/value propagation at "gradients_1/bert/encoder/layer_0/attention/self/MatMul_1_grad/BroadcastGradientArgs" node. 
 For more information please refer to Model Optimizer FAQ (https://docs.openvinotoolkit.org/latest/_docs_MO_DG_prepare_model_Model_Optimizer_FAQ.html), question #38. 

[metanav]

It means Openvino does not support some of the ops. How did they convert BERT?