template < typename OWNER_T > class SchedulerTaskProxy_c : public SchedulerTask_c
  { public:
      typedef OWNER_T Owner_t;
      SchedulerTaskProxy_c( Owner_t &art_owner ) : mrt_owner( art_owner ) {}   <<Error[Pe291]: no default constructor exists for class
      virtual ~SchedulerTaskProxy_c() {}
    private:
      virtual void timeEvent() { mrt_owner.timeEvent(); }
      // SchedulerTaskProxy_c shall not be copyable. Otherwise the
      // reference to the containing object would become invalid.
      SchedulerTaskProxy_c( SchedulerTaskProxy_c const & );
      SchedulerTaskProxy_c &operator=( SchedulerTaskProxy_c const & );
      Owner_t &mrt_owner;
  };

class BaseCommon_c : public CanCustomer_c
  {public:
    ...
   private:
    ...
    class SchedulerTaskProxy_c : public SchedulerTask_c
    { public:
       typedef BaseCommon_c Owner_t;
       SchedulerTaskProxy_c(Owner_t &art_owner) : SchedulerTask_c( 100, true ), mrt_owner(art_owner) {}
       virtual ~SchedulerTaskProxy_c() {}
       private:
       virtual void timeEvent() { return mrt_owner.timeEvent(); }
       // SchedulerTaskProxy_c shall not be copyable. Otherwise the reference to the containing object would become invalid.
      SchedulerTaskProxy_c(SchedulerTaskProxy_c const &);
      SchedulerTaskProxy_c &operator=(SchedulerTaskProxy_c const &);
      Owner_t &mrt_owner;
    };
    typedef SchedulerTaskProxy_c Task_t;
    ....
   }