Command extend/redeclare for constants does not work properly OM 1.13.0 Linux

[jan.peter.axelsson@…]

Command extend/redeclare for constants does not work properly OM 1.13.0 Linux

See

​https://stackoverflow.com/questions/54998306/modelica-how-to-extend-a-minimal-medium-package

[jan.peter.axelsson@…]

Running "test" will give an error message

[Per Östlund]

I can't reproduce the issue you describe in the link, the model flattens just fine using the latest version of OM. You might want to try OM 1.13.2, although I don't think we've fixed any redeclare issues since 1.13.0.

However, the model is not valid, because DEMO_v9.Equipment.PumpType extends from EquipmentMedium which is a replaceable class. Extending from a replaceable class is not allowed in Modelica, see section 6.2.1 (Transitively non-Replaceable) in the Modelica specification.

We've been working on a new instantiation for some time now, which will be the default instantiation in OM 2.0.0. Trying to compile the model with it (using the compiler flag -d=newInst) correctly gives the error:

[DEMO_v9.mo:59:15-61:22:writable] Notification: From here:
[DEMO_v9.mo:64:4-64:27:writable] Error: Class 'EquipmentMedium' in 'extends EquipmentMedium' is replaceable, the base class name must be transitively non-replaceable.

Our current frontend does not check this restriction, which can cause all sorts of weird behaviour.

I'm closing this ticket since there doesn't seem to be anything to fix here, but you can still ask questions about your model in this ticket if you so wish.

[jan.peter.axelsson@…]

Application code to be used together with library code DEMO_v9 you already got