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Please I have Mathcad 14 on a Vista Tabletpc. I define a function f(x,y), plot it (Surface plot, Ctrl+2) but nothing appears and no error or warning appears. If I change in Contour plot, I see very very low gray lines.
Vista has been reported as not friendly with Mathcad, the video card and/or the driver is another problem and set the video speed to minimum. 3 things that contribute to non rendering the 3D plots. It's your system, not Mathcad. In the worst case: contact PTC with your contract in hand.