Is there a way to check weather a file is valid before its opened and a vtk error message is thrown.....Openvtk always rreturns a 1 as long as the file is named .vtk?thx -- View this message in context: http://www.nabble.com/vtkPolyDataReader-tf4789895.html#a13702404 Sent from the VTK - Dev mailing list archive at Nabble.com.