Does any other math-funnik use the Mac Grapher utility? It can do so many things to create a 2D or 3D image . . . BUT it is buggy as hell. At least the version that came with my Mac -- among the very last with a Motorola chip -- plus all Apple updates to my software. It was, I think, created in a story that is now legendary among programmers: < http://www.pacifict.com/Story/ >. But I sure wish they would debug the *&^%$@ thing. Case in point: Just now I wanted to draw a family of plane curves with a simple parametric equation depending on one additional parameter . . . for six values of that parameter. Grapher supposedly has a syntax for doing this: just stick the additional parameter in curly brackets, and either explicitly write all parameter values, or the first two and the last one. In my case, according to the examples and the (very sparse) Help file, that should appear as either {0.5, 0.6, 0.7, 0.8, 0.9, 1.0} or {0.5, 0.6...1.0}, respectively. But neither one works. Boiled down: Using either {1.0} or {0.5} my tiny Grapher program draws the correct curve. But using {0.5, 1.0} instead, it draws two curves that are both wrong! Has anyone figured how to get around stupid bugs like this? --Dan Those who sleep faster get more rest.