[vtkusers] about vtkLoopSubdivisionFilter runtime error

[sha1 at doc.ic.ac.uk]

Dear friends,
   I get the run time error on the following bit of error from
vtkLoopSubdivisionFilter in Win 2000 , VC++ .Net . I get the error only when I
actually set number of subdivisions to greater than zero. Any help will be
appreciated. I suspect that there is no such run time error in linux (because
some other code works fine ) , can any body help me in this matter.

char *srcpath="C://notred//_d_UNIFORMED_TEXTURED//02463_458.vtk";
        char *bmppath="C://notred//_d_UNIFORMED_TEXTURED//02463_458.bmp";
char *tarpath="C://notred//_d_UNIFORMED_TEXTURED//02463_458.vtk";
        struct coords
        {
                unsigned x;
                unsigned y;
        };
        src_reader = vtkPolyDataReader::New();
    src_reader->SetFileName(srcpath);
        src_reader->Update();
        vtkPolyData *ply=vtkPolyData::New();
        ply=src_reader->GetOutput();
        vtkLoopSubdivisionFilter *subdivider = vtkLoopSubdivisionFilter::New();
        subdivider->SetInput(ply);
        subdivider->SetNumberOfSubdivisions(1);
        subdivider->Modified();
        subdivider->Update();

Thanks in advance ,

Yours,

Hassan Amin