Yifei, I don't understand the issue. I DL'ed your file and proceeded as follows Edit/Settings/General/Auto Convert Properties checked (On)
Find Data Find POINTS in test_data.vtu Loc(0) is >= 0.009 Run Selection Query Extract Selection This correctly extracted the 1 point met that requirement If I change to a query of (Loc[:,0] >= .008) & (Loc[:,1] >= -.0004) then it correctly selects the single point that meets that criteria. Perhaps the difficulty is because you haven't set Auto Convert Properties Hope this helps. Dennis
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview