Hi Sebastian, I have updated to VTK 5.6.0 and it works. Thanks a lot! Leroi -- View this message in context: http://vtk.1045678.n5.nabble.com/Segmentation-fault-in-QVTKWidget-x11-setup-window-tp2262707p2262733.html Sent from the VTK - Users mailing list archive at Nabble.com.