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The code below generates the error when I attempt to export to CDF Preview:

Coordinate {xde[4.69588928222656], yde[4.69588928222656]} should be a pair of numbers, or a Scaled or Offset form.

Here is my code:

system = {x'[t] == 2 x[t] - 0.08 x[t] y[t], x[0] == 400,
   y'[t] == -y[t] + 0.01 x[t] y[t], y[0] == 25};

sol = NDSolve[system, {x[t], y[t]}, {t, 6}];

{xde[t_], yde[t_]} = {x[t], y[t]} /. Flatten[sol];

  ParametricPlot[{xde[t], yde[t]}, {t, 0, 5.4}, 
   AxesLabel -> {"Prey", "Predator"}, AspectRatio -> 1, 
   PlotRange -> {{0, 400}, {0, 80}}], 
  Graphics[{Red, PointSize[Large], Point[{xde[t], yde[t]}]}]], {t, 0, 
  5.4, AppearanceElements -> "PlayPauseButton"}, AnimationRate -> 0.5]

How can this be fixed? Thx.

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up vote 3 down vote accepted

You are just missing the SaveDefinitions -> True option in the Animate command.

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You passed me in reputation: NOT ALLOWED! :) – rcollyer Oct 25 '13 at 14:13
@rcollyer -- sorry, didn't mean to! – bill s Oct 25 '13 at 14:31

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