Wrong creation of Clock with real interval

[Rüdiger Franke]

The following model creates a clock with Real interval. It worked if dt was constant; it fails if dt is a parameter (see e.g. Modelica_Synchronous):

model RealParameterClock
  parameter Real dt = 0.1 annotation(Evaluate = true);
  input Real u;
  output Real y(start = 0);
equation
  when Clock(dt) then
    y = previous(y) + u;
  end when;
end RealParameterClock;

The code attempts to access the non existing previous(dt):

RealParameterClock_15syn.c:63:53: error: ‘$P$CLKPRE$Pdt’ undeclared (first use in this function)
       data->simulationInfo.clocksData[i].interval = $P$CLKPRE$Pdt;
                                                     ^

Alternatively in the Cpp runtime (+simCodeTarget=Cpp):

OMCppRealParameterClock.cpp: In member function ‘virtual void RealParameterClock::getTimeEvent(time_event_type&)’:
OMCppRealParameterClock.cpp:402:45: error: ‘_$CLKPRE_P_dt’ was not declared in this scope
   time_events.push_back(std::make_pair(0.0, _$CLKPRE_P_dt));
                                             ^

[Rüdiger Franke]

duplicate #3498

[Lennart Ochel]

I guess this could be easily fixed by modifying back end module clockPartitioning. The function SynchronousFeatures.substClockExp should only wrap the inExp if it is variable (not constant nor parameter expression of type real).

[Martin Sjölund]

Milestone renamed

[Martin Sjölund]

Milestone renamed