Question: Error with pdsolve/numeric

I need to solve a 2 order hyperbolic PDE (The Wheeler-DeWitt equation for a closed universe), numerically, with some sort of complex initial/boundary conditions. It seems that the program is executed and the module is returned, but while I use the plot, plot3d, value… commands for different values of time variable (\phi), the following error is appeared on my Maple 12 worksheet:

Error, (in pdsolve/numeric/plot) unable to compute solution for phi>.336103580999999984:

solution becomes undefined, problem may be ill posed or method may be ill suited to solution

 

I truly appreciate any help.

Saeid

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