SAP Message APPLG410 - MUX: Graphics proxy supplied as parameter in method call is unknown

Diagnosis A method in the multiplexer has been called containing a graphics proxyreference as a parameter. However, the graphics proxy referenceis not valid. The graphics proxy is not registered with the multiplexer. Procedure Make sure that the graphics proxy is registered with the multiplexer(CL_GFW_MUX=>SUBSCRIBE).