aPrs = IsoSurfacesOnField(aProxy, aFieldEntity,aFieldName , i)
if aPrs is None:
raise RuntimeError, "Presentation is None!!!"
#display only current scalar map
aPrs = IsoSurfacesOnField(aProxy, aFieldEntity,aFieldName , i)
if aPrs is None:
raise RuntimeError, "Presentation is None!!!"
#display only current scalar map