id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
4813	Structural parameters not substituted in connection equations by the NF	Francesco Casella	Per Östlund	"Consider the follwoing test case
{{{
model Test
  extends ScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_10_M_10(N = 1, M = 1);
end Test;
}}}
The NF reports one more equation than unknowns. A comparison with the equations flattened with the OF reveals that the NF contains extra equations involving {{{secondary[1,M].n}}}, which should not be there as this connector is actually {{{secondary[1,1].n}}}, which already appears in other equations.

Apparently, these extra equations come from the equations:
{{{
  for i in 1:N loop
    connect(activeLoad[i].p, secondary[i,M].n);
  end for;
}}}
which are contained in the {{{DistributionSystemModelicaActiveLoads}}} class, whereby M is not substituted with its value 1, thus generating the problem.

The same problem arises with the {{{ScalableTestSuite.Electrical.TransmissionLine.ScaledExperiments.TransmissionLineModelica_N_XX}}} models, where the following equation appears in the flattened model:
{{{
transmissionline.L[transmissionline.N].n
}}}
"	defect	closed	high	2.0.0	New Instantiation		fixed