[vtkusers] help!

[jw4 at 263.net]

Hi,
    I am a new vtk user.When I read 4.8 Picking in Chapter 4 of the vtk-user-guide,there is a example on page 69 : \VTK\Examples\Annotation\Tcl\annotatePick.tcl.I run the example,but the program errs.It says,textMapper could not find requested method:GetTextProperty or the method was called with incorrect arguments.
    Please help me!
    Many many thanks!





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