Hi Rakesh, > Flot.Nan solved the problem...but i get flickering text "Please > wait.." in display. How should i get rid of this. The "Please wait ..." messages are appropriate, since you are constantly re-transforming Data into depictions. If you add a small delay to your loop for updating your line it may be less noticeable. Also, you might be able to get rid of it by extending DefaultDisplayRendererJ3D and over-riding the drawCursorStringVector() method. Good luck, Bill
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