java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.ligadata.MetadataAPI.JpmmlSupport$$anonfun$9.apply(JpmmlSupport.scala:170)
at com.ligadata.MetadataAPI.JpmmlSupport$$anonfun$9.apply(JpmmlSupport.scala:169)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:245)
at com.ligadata.MetadataAPI.JpmmlSupport.CreateModel(JpmmlSupport.scala:169)
at com.ligadata.MetadataAPI.ModelUtils$.AddPMMLModel(ModelUtils.scala:605)
at com.ligadata.MetadataAPI.ModelUtils$.AddModel(ModelUtils.scala:518)
at com.ligadata.MetadataAPI.MetadataAPIImpl$.AddModel(MetadataAPIImpl.scala:2308)
at com.ligadata.MetadataAPI.Utility.ModelService$.addModelPmml(ModelService.scala:308)
at com.ligadata.MetadataAPI.StartMetadataAPI$.route(StartMetadataAPI.scala:490)
at com.ligadata.MetadataAPI.StartMetadataAPI$.main(StartMetadataAPI.scala:354)
at com.ligadata.MetadataAPI.StartMetadataAPI.main(StartMetadataAPI.scala)

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