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limited complexity of equation driven curve?

Question asked by 1-QMNENI on Nov 18, 2010
Latest reply on Nov 19, 2010 by Harold Brunt

This is a 2D optical 4th-order aspheric curve of the form Dx^4+x^2/(R+(R^2+x^2(k+1) )^.5) that I'm trying to sketch, then revolve:


    y(x)= .0002629*x^4+x^2/(39.5194+(1561.78-27.7483*x^2)^.5)    -11 <= x <= 11


and SW fails on it.  Click on the green checkmark and it just disappears w/o a trace.  Anyone know why?  Is there a limit on the length of the equation or the number of of nested parentheses?