[Paraview] Animation problem

[Manu GV]

Dear Paraview Users,

I am plotting contour and finding the maximum value of a variable. I am 
doing this with the help of a script(attached) and I run it in python 
shell in Paraview-GUI.

When I animate it, contour animation works but the maximum value of the 
variable is not updated with time.

Can anyone please shed some light over this? Or how to show the maximum 
value of an variable along with the contour?


Thanks in advance!!
Manu
-------------- next part --------------
#Read Time series file
reader = OpenDataFile("main.xmf")
readerRep = GetRepresentation(reader)
readerRep.Representation = 'Outline'
Show()

#Convert Cell Data to Point Data
pread = CellDatatoPointData(reader)
Show()
Hide(pread)

#Find Max value of Swirl and Show it on screen
vor = pread.PointData['Swirl'].GetRange()
txt = Text()
txt.Text = "Vortex = " + str(vor[1])
Show()
Render()

#Draw isosurface of a variable "Swirl"
new = Contour(pread)
new.ContourBy='Swirl'
new.Isosurfaces = 100
Show()
Render()

#Animate
AnimateReader(reader,filename="anime.avi")