problems with variability of records and warnings that its values are not assigned.

[Michael Wetter]

If the model below is simulated using
loadModel(TestRecord);
simulate(TestRecord.myModelInstance);
getErrorString();

then the following error occurs:

messages = "Simulation failed for model: TestRecord.myModelInstance
home/mwetter/proj/ldrd/bie/modeling/bie/branches/mwetter/openmodelica/TestRecord.mo:11:5-11:60:writable Error: Component mymodel.p of variability PARAM has binding mytwo of higher variability VAR.

Since mymodel.p is a record in which all members are parameters, my interpretation is that its variability should also be PARAM as opposed to VAR.

If the line

TestRecord.myRecords.myTwo mytwo;

is changed to

parameter TestRecord.myRecords.myTwo mytwo;

then the model simulates, and computes the correct result mymodel.x=2. However, the warning

Warning: Parameter mymodel.p.r has neither value nor start value, and is fixed during initialization (fixed=true)

occurs despite that r is assigned the value 2 in the declaration of myTwo.

within ;
package TestRecord

package myRecords

record myTwo = myRecords.BaseRecord(r = 2);
record BaseRecord

parameter Real r;

end BaseRecord;

end myRecords;

model myModel

replaceable parameter TestRecord.myRecords.BaseRecord p;
Real x;

equation

x=p.r;

end myModel;

model myModelInstance

TestRecord.myRecords.myTwo mytwo;
TestRecord.myModel mymodel(p = mytwo);

end myModelInstance;

annotation(uses(Modelica(version = "3.1")));

end TestRecord;