On this Howto page, there is some clickable input listing a differential equation to be solved numerically and plotted.
The input has been URL-encoded, so it looks like:
ode1 = {y''[x] + Sin[y[x]] == 0, y[0] == 2, y'[0] == 1};
Where it should contain:
ode1 = {y''[x] + Sin[y[x]] == 0, y[0] == 2, y''[0] == 1};
The NDSolve[] invocation which follows this erroneous input understandably complains. Of course it does this in an unintelligible way.
There is more than one equation on this page with the same affliction.
Regards..
Roger Williams
Franklin Laboratory
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