id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1102	Problems with complex flow components: a) flow arrtibute not propagated; b) extra incorrect equations.	AlexeyLebedev	AlexeyLebedev	"Consider the following example:

record Rec
  Real r;
  flow Real fr; 
end Rec;    
  
connector C
  flow Rec rec;
end C;    

class Test
  C c1, c2;
equation  
  connect(c1,c2);
end Test;

It is translated to the following flat Modelica:

fclass Test
Real c1.rec.r;
Real c1.rec.fr;
Real c2.rec.r;
Real c2.rec.fr;
equation
  (-c1.rec.fr) + (-c2.rec.fr) = 0.0;
c1.rec.r = c2.rec.r;
  c2.rec = 0.0;
  c1.rec = 0.0;
end Test;

I.e., we see that
a) flow atribute of rec is not propagated to its components - c1.rec.r and c2.rec.r are treated as non-flow variables (and the corresponding DAE.VARs have NON_FLOW attribute).
b) extra incorrect (and meaningles) equations for ""unconnected flow variables"" c1.rec and c2.rec are created.

(By the way, about this part:
record Rec
  ...
  flow Real fr; 
end Rec;    

Is it legal, according to specifications? I mean a non-connector class (Rec) having a component (fr) of non-connector class (Real) with flow prefix - what does ""flow"" mean in this case?)"	defect	closed	high		Instantiation		fixed		AlexeyLebedev