Hi: May someone help me with this? libpng warning: Application was compiled with png.h from libpng-1.2.7 libpng warning: Application is running with png.c from libpng-1.0.12 libpng error: Incompatible libpng version in application and library ERROR: In /usr/local/VTK/IO/vtkPNGReader.cxx, line 56 Thanks, David