<div>Dear all,</div>
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<div>when i tried to run examples below<br clear="all"></div>
<div>TestAngleWidget.cxx</div>
<div>TestAngleWidget3D.cxx</div>
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<div>i encountered warnings like below</div>
<div>Generic Warning: ....</div>
<div>Passive observer should not call AddObserver or RemoveObserver .....</div>
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<div>and fix for these examples?</div>
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<div>i am using self-built vtk5.4 with Visual Studio 2008 express</div>
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<div>thank you</div>
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<div>regards</div>
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<div>O.S<br></div>