ftle paraview

I tried with 5.2 there is no option in the meantime I am trying with VCG FTLE as I mentioned earlier. But there is some issue as FTLE could not be calculated. When I tried with the variable say wind velocity the operator FTLE could not be used for calculation. Is it that I have to make some other calculation before using FTLE? I have uploaded a file as mentioned on the trailing mail of Hoffman