Is it possible to use Maple 14 to solve a system of second order partial differential equations numerically. I have tried to do this and keep getting the following error messages:

Error, (in pdsolve/numeric/plot) unable to compute solution for t>0.: matrix is singular.

Error, index must evaluate to a name when indexing a module.

I am concerned that there may actually be a problem with the system of PDE's I have set up not...