Hello <br><br> <br>I was trying to run example which demonstrates <a
class="el"
href="http://www.vtk.org/doc/nightly/html/classvtkCameraRepresentation.html">vtkCameraRepresentation</a> & <a class="el" href="http://www.vtk.org/doc/nightly/html/classvtkCameraInterpolator.html">vtkCameraInterpolator</a><br>but it gives me error mesage (see below) and does not run. <br><br><br>$ vtk CameraAndSliderWidgets.tcl<br>Error in startup script: invalid command name "vtkCameraRepresentation"<br> while executing<br>"vtkCameraRepresentation cameraRep"<br> (file "CameraAndSliderWidgets.tcl" line 81)<br><br>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>This is the line 81:<br>vtkCameraRepresentation cameraRep<br>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br><br>