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I am trying to build input/output connectors as interfaces and add them in a wrapper class that wraps a model. The variables of the connectors are defined using conditional declaration. when I instantiate the output connector in the wrapper class, I can compile the class successfully in Dymola when I use an "equation" section. but when I change it to an "algorithm" section I got an error that:

It has 2 scalar unknowns and 5 scalar equations.
The Real part has 2 unknowns and 2 equations.
The Integer part has 0 unknowns and 2 equations.
The Boolean part has 0 unknowns and 0 equations.
The String part has 0 unknowns and 1 equations.

I have trouble understanding this error. I know the general difference between an algorithm section and an equation section but cannot relate my knowledge to the error that I am getting. I created a small example of what I am trying to compile:

here are the connector definitions: 

connector DO
/**/
parameter String Type;
parameter input Integer[:] Dim;
discrete output Real ScalarReal if Type == "Real" and size(Dim, 1) == 1 and          Dim[1] == 1 "Scalar Real";
discrete output Real[Dim[1],Dim[2]] MatrixReal if Type == "Real" and  size(Dim, 1) > 1 "Matrix Real";

end DO;

connector DI
parameter String Type;
parameter input Integer[:] Dim;
discrete input Real ScalarReal if Type == "Real" and size(Dim, 1) == 1 and Dim[1] == 1 "Scalar Real";
discrete input Real[Dim[1],Dim[2]] MatrixReal if Type == "Real" and size(Dim, 1) > 1 "Matrix Real";
end DI;

connector Conn
 parameter input Integer nOut(min = 0) = 0;
 parameter input Integer nIn(min = 0) = 0;
 DI[nIn] InConn if nIn > 0;
 DO[nOut] OutConn if nOut > 0;
 end Conn;

and the wrapper model 

model Wrapper
Conn testConn(nIn = 0, nOut = 1, OutConn(Type = {"Real"}, Dim = {{2,1}}));
equation 
when sample(0,10) then
  testConn.OutConn[1].MatrixReal = [2; 3];
end when;
end Wrapper;

Can anyone help me with this problem? Thanks a lot!

Shaga
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  • The Modelica Specification 3.3 rev.1 Section 4.4.5 "Conditional Component Declaration" says: "A component declared with a condition_attribute can only be modified and/or used in connections." Therefore, you get undefined behaviour. – Tobias Jun 29 '15 at 17:16
  • Hi Tobias. Thanks for your answer. I added a connector instead of the Real Matrix [2;3] and it worked fine with an algorithm even though I did not use a connect statement. – Shaga Jul 16 '15 at 09:51

0 Answers0