An exposure apparatus includes a carrying member for carrying thereon a workpiece and a supporting mechanism having a magnet, for supporting a weight of the carrying member. In a first method step, a first individual film is picked up by at least one first gripping device and the gripping device is moved together with the film in a first movement direction. The electronic underlay is provided with: a sheet-like optical waveguide formed by sandwiching lattice-like cores between a sheet-like under cladding layer and a sheet-like over cladding layer; a light emitting element connected to one end surface of the cores; and a light receiving element connected to another end surface of the core. A stall-signal may be asserted in order to stall the computational pipeline if the second module is not ready to receive the one or more signals from the first module. The method includes identifying an IP network address associated with the user recipient based on the device-independent unique identifier and routing a message entered by the operator to the determined IP network address.