When I execute the Tcl example \examples\VisualizationAlgorithms\Tcl\officetube.tcl I see this error: ERROR: In C:\martink\vtk40\VTK\IO\vtkDataReader.cxx, line 390 vtkStructuredGridReader (0x020C9DC8): Unable to open file: C:\Program Files\TclPro1.4\vtk40\Wrapping\Tcl\vtkbase\..\..\..\..\VTKData/Data/office.binary.vtk whazzzsup? thanks, Mike N.