Op type not registered 'MergeSemanticAndInstanceMaps' in binary running on wvmgputprseus

[ShivaThe]

I have exported panoptic_deeplab model. I'm getting following error while loading the model using tf.saved_model.load()
NotFoundError: Op type not registered 'MergeSemanticAndInstanceMaps' in binary running on wvmgputprseus. Make sure the Op and Kernel are registered in the binary running in this process. Note that if you are loading a saved graph which used ops from tf.contrib, accessing (e.g.) tf.contrib.resampler should be done before importing the graph, as contrib ops are lazily registered when the module is first accessed.