ChemDraw Chem3D: I'm getting an error message when I try to display MOPAC Molecular Electrostatic Potential Surfaces

I'm getting an error message when I try to display MOPAC Molecular Electrostatic Potential Surfaces.

If an error message appears when trying to display MOPAC MEP surface, try a smaller grid setting using the Molecular Electrostatic Potential Surface dialog box.