Hi all, I have solved my problem. The reason that vtkDebugLeaks did not work is that I did not link the dll with pdb(program debug database). Anne. -- View this message in context: http://vtk.1045678.n5.nabble.com/vtkDebugLeaks-problems-tp5594643p5597389.html Sent from the VTK - Users mailing list archive at Nabble.com.