Solving of linear system of equations generates incorrect results.

[Adrian Pop]

Bug reported by H. Dieter Wilhelm.
Simulation of model Test below generates incorrect results.
{{{connector Port

Real pressure;

flow Real flowrate;

end Port;

model Pipe

Port port;

parameter Real a = 1;

equation

port.pressure = port.flowrate * a;

end Pipe;

model Pump

Port port;

equation

port.flowrate = -( time - port.pressure);

end Pump;

------------------------------

model Test

Pump pu;
Pipe pi;

equation

connect(pu.port,pi.port);

end Test;
}}}
{{{simulate(Test);
}}}

See the plot. 

The results should follow:
  pi.flowrate = time/(1+a)
 
but the results are basically constant (except for the time variable).
There is only a step change at the last time step!?

[Adrian Pop]

fixed in revision 3601.

[Adrian Pop]

Correct output after bug was fixed.

[Adrian Pop]

Correct output now after bug was fixed:

[{Image src='​http://openmodelica.ida.liu.se:8080/cb/displayDocument/correct.png?attachment_id=40' alt= width='492' height='250' }]