rem: std::cerr << e.what() << std::endl;
add: SLOG << e.what() << endLog;
context: void display(){    try    {        // receive scenegraph and do rendering        server->render(ract);        // clear changelist         OSG::Thread::getCurrentChangeList()->clearAll();    }     catch(OSG_STDEXCEPTION_NAMESPACE::exception &e)    {        std::cerr << e.what() << std::endl;        // try to restart server        server->stop();        // start server, wait for client to connect        server->start();    }}