I tried that. It still does not work. I reason that I can think of is that I had omited Infovis while building VTk. Might that really affect the run or rendering the View Port?? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20110805/6e6d1b27/attachment.htm>