Medium.nC incorrectly set to 0 instead of 1.

[Michael Wetter]

The regression tests

Annex60.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow
Annex60.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlowPrescribedHeatFlowRate

fail with

[/var/lib/hudson/jobs/OpenModelica_TEST_ALL_LIBRARIES/workspace/OpenModelica/build/lib/omlibrary/Annex60 0.1/Fluid/MixingVolumes/Validation/MixingVolumeTraceSubstanceReverseFlow.mo:12:3-13:47:writable]
 Error: Subscript '1' for dimension 1 (size = 0) of volSte.C_flow[1] is out of bounds.
Error: Error occurred while flattening model Annex60.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow

The problem seems to be that OpenModelica does not assign Medium.nC correctly (which is declared in PartialMedium as
final constant Integer nC=size(extraPropertiesNames, 1)).

If I move the assignment

package Medium = Annex60.Media.Air (
      Medium(extraPropertiesNames={"CO2"})) "Medium model";

from Annex60.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow to its base class
Annex60.Fluid.MixingVolumes.Validation.BaseClasses.MixingVolumeReverseFlow,
then omc hangs.

There doesn't seem to be a work-around.

[Francesco Casella]

@perost can you make sure this works properly with the new front end?

[Per Östlund]

Move all tickets from NF - New Frontend to New Instantiation so we don't have two different categories for the same thing.

[Francesco Casella]

The NF still fails on this example for other reasons, see ​Annex60.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.

This should be checked periodically until the NF can handle it.

[Francesco Casella]

The issue described in this ticket is solved. The new problem is reported in #5338