Warnings messages when comparative view is created
Simply create the Render View (Comparative View) in ParaView. You'll get following warning messages:
Warning: In /home/utkarsh/Kitware/ParaView3/ParaView/ParaViewCore/ClientServerCore/Rendering/vtkPVDataRepresentation.cxx, line 228 vtkPolarAxesRepresentation (0x583f350): Added representation has a non-null 'View'. A representation cannot be added to two views at the same time!