[Paraview] streamlines

[Giovanni Delibra]

Hello everybody
I have some problems in understanding how to plot streamtraces
My problem is that whatever the seed type I use they seem to "die out"  
just a few distance from the seed
In the picture you can see this matrix of cylinders where flow is flowing  
in x direction with streamtraces released in the midsection along a  
line... it seems to be impossible to have streamlines along the whole  
domain

My pipeline is something that
load file > cell data to point data > surface vectors > streamtraces
any suggestions?
TIA

-- 
Giovanni Delibra
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