hi all.., when i run medical2.cxx under vc++6 the output appears like an empty rectangle which can be render but there is no data inside it!! i do the following modification: v16->SetFilePrefix (argv[1]); (in the original file) v16->SetFilePrefix ("d/ DATADIR/headsq/quarter");(MODIFICATION done) for sure i put the data(headsq\quarter) in the folder DATADIR) but the output still rendered with empty data it seems that it can't find the path to get the data... Errors in the background screen is: ERROR: In C:\martink\vtk40\VTK\IO\vtkVolume16Reader.cxx, line 390 vtkVolume16Reader (0x00EC4B20): Can't find file: d/ex/DATADIR/headsq/quarter.1 ERROR: In C:\martink\vtk40\VTK\Graphics\vtkContourFilter.cxx, line 166 vtkContourFilter (0x00EC5C30): No data to contour ERROR: In C:\martink\vtk40\VTK\Graphics\vtkPolyDataNormals.cxx, line 111 vtkPolyDataNormals (0x00EC56A0): No data to generate normals for! ERROR: In C:\martink\vtk40\VTK\Graphics\vtkContourFilter.cxx, line 166 vtkContourFilter (0x00EC6840): No data to contour ERROR: In C:\martink\vtk40\VTK\Graphics\vtkPolyDataNormals.cxx, line 111 vtkPolyDataNormals (0x00EC62B0): No data to generate normals for! _____________________________________________________________ Free shareware + free products & services at U.S. Computer Corporation - http://www.uscomputer.net/portal.htm _____________________________________________________________ Select your own custom email address for FREE! Get you@yourchoice.com w/No Ads, 6MB, POP & more! http://www.everyone.net/selectmail?campaign=tag