vtkMedFieldStep* otherstep = otherfield->GetFieldStep(stepid);
vtkMedFieldStep* step = vtkMedFieldStep::New();
step->SetComputeStep(otherstep->GetComputeStep());
vtkMedFieldStep* otherstep = otherfield->GetFieldStep(stepid);
vtkMedFieldStep* step = vtkMedFieldStep::New();
step->SetComputeStep(otherstep->GetComputeStep());