Hello Andreas, [snip] Replace with the following lines and everything should work:

sc::in_state_reaction< EvBack, CoreApp, (void (CoreApp::*)(const EvBack &)) &CoreApp::doInStateReaction >, sc::in_state_reaction< EvNext, CoreApp, (void (CoreApp::*)(const EvNext &)) &CoreApp::doInStateReaction >

Yes, thats what I'm looking for. Now it compiles. Thanks a lot :-) David