assigning Medium package in replaceable class fails

[Michael Wetter]

Translating various models fail with the message

Buildings.Fluid.Boilers.Examples.BoilerPolynomial: 28:3-39:70]: component boi1 contains the definition of a partial class Medium.
Please redeclare it to any package compatible with Modelica.Media.Interfaces.PartialMedium.

or similarly

[5] 21:45:22 Translation Error
[Buildings.Examples.Tutorial.Boiler.System3: 153:3-160:72]: component boi contains the definition of a partial class Medium.
Please redeclare it to any package compatible with Modelica.Media.Interfaces.PartialMedium.

The problematic code seems to be in Buildings.Fluid.Interfaces.TwoPortHeatMassExchanger:

 replaceable Buildings.Fluid.MixingVolumes.MixingVolume vol
  constrainedby Buildings.Fluid.MixingVolumes.BaseClasses.PartialMixingVolume(
    redeclare final package Medium = Medium,
    ...

This is a blocker if users want to use OpenModelica during the tutorial at the MODPROD workshop.

The error from our other tutorial that we could use also seems related as we use a similar construct in the cooling coil:

[/var/lib/hudson/jobs/OpenModelica_TEST_ALL_LIBRARIES/workspace/OpenModelica/build/lib/omlibrary/Buildings latest/Fluid/Interfaces/PartialFourPort.mo:4:15-6:45:writable] Notification: From here:
[/var/lib/hudson/jobs/OpenModelica_TEST_ALL_LIBRARIES/workspace/OpenModelica/build/lib/omlibrary/Buildings latest/Examples/Tutorial/SpaceCooling/System2.mo:82:3-100:28:writable] Error: component cooCoi contains the definition of a partial class Medium1.
Please redeclare it to any package compatible with Modelica.Media.Interfaces.PartialMedium.
Error: Error occurred while flattening model Buildings.Examples.Tutorial.SpaceCooling.System2

[anonymous]

i have the same issue too

[Francesco Casella]

As of May 7 2018, the new FE reports this ​error message:

Notification: Performance of NFInst.instantiate(Buildings.Fluid.Boilers.Examples.BoilerPolynomial):
time 0.5755/0.5756, allocations: 121.1 MB / 0.6233 GB, free: 12.68 MB / 0.5105 GB
[/var/lib/hudson/slave/workspace/OpenModelica_TEST_LIBS/OpenModelica/OMCompiler/Compiler/NFFrontEnd/NFRecord.mo:183:9-183:99:writable]
Error: Internal error NFRecord.collectRecordParams got non-instantiated function

I'm not sure if the NF actually manages to get to the point reported in this ticket or if it breakes earlier.

[Francesco Casella]

See also the discussion in ticket:4172#comment:3

[Francesco Casella]

The reported problem seems to be solved now. The model cited in this ticket still fails to simulate but due to other issues.

[sullivbj]

Hello,
I am working through the Buildings library tutorials and it would appear that this problem is not fixed as the same error still appears. The library author, Michael Wetter, reports that the model works fine in Dymola and Jmodelica therefore the problem must be with OpenModelica. Any ideas?

Thanks,
Brendan

[Per Östlund]

Replying to sullivbj:

Hello,
I am working through the Buildings library tutorials and it would appear that this problem is not fixed as the same error still appears. The library author, Michael Wetter, reports that the model works fine in Dymola and Jmodelica therefore the problem must be with OpenModelica. Any ideas?

Thanks,
Brendan

Are you using the new frontend? It's not enabled by default, you need to enable it by turning on the "Enable experimental new instantiation phase" in Tools->Options->Simulation in OMEdit. If you don't have this option you're using an old version of OM and should upgrade, preferably to the latest nightly build since the new frontend is work in progress.

According to our ​library coverage testing at least the mentioned BoilerPolynomial model simulates correctly using the new frontend, but there's still some work left before we have full coverage of the Buildings library.