If you are getting error message like [error] Maxwell2d solver, process solver2d error: Internal Solver Error: ‘ The Faces ( 99999 [11 444] 55555 [44 15 23 49 87 ] ) have common facets: 653 ‘ it could be challenging to find this faces/edges by manually navigating to the face and waiting for a tooltip with face ID. The easiest way to find all faces is to activate the Face selection by pressing the “F” button on your keyboard and then go to menu Edit – Select Objects – By name If you select your object in the left column you will get in the right column the list of all the faces belonging to that object