I am trying to use model optimizer to convert a mxnet model. a error ‘_contrib_MultiBoxTarget and smooth_l1 not supported’ occured. the detail error message is as bellow.
[ ERROR ] Unexpected exception happened during extracting attributes for node label. Original exception message: Operation '_contrib_MultiBoxTarget' not supported. Please register it as custom op. For more information please refer to Model Optimizer FAQ (https://docs.openvinotoolkit.org/latest/_docs_MO_DG_prepare_model_Model_Optimizer_FAQ.html), question #86.