An eigenanalysis requires at a minimum a 2D or 3D geometry (depending on the solver) together with appropriate analysis attributes (i.e. materials and boundary conditions). For 2D models that will be analyzed using OM2p, the geometry should consist of one or more planar solids. 3D models may contain only 3D solids. There should be no isolated geometry, and there is no electrical connection between solids that only touch at edges/corners in 3D, or just at corners in 2D. In OM3p the simulation domain may be located anywhere in 3D space. In OM2p, the simulation domain should be in the x-y plane, and if simulating in cylindrical coordinates the simulation domain should also be above the x-axis.