add: if (is_prepared() == true) return(ECA_ENGINE::engine_status_stopped);
context: ECA_ENGINE::Engine_status_t ECA_ENGINE::status(void) const{   if (csetup_repp == 0)     return(ECA_ENGINE::engine_status_notready);  /* calculated in update_engine_status() */  if (finished_rep == true)    return(ECA_ENGINE::engine_status_finished);    if (outputs_finished_rep > 0)     return(ECA_ENGINE::engine_status_error);  if (is_active() == true)     return(ECA_ENGINE::engine_status_running);  return(ECA_ENGINE::engine_status_stopped);}