IDEAS v4.0.0 (master) not loading in OpenModelica 1.25.5 – Syntax errors and PVTCollectors break keyword

[Sen-Swaegers]

I am trying to use IDEAS v4.0.0 (master branch) with OpenModelica 1.25.5 (64-bit)
on Windows 11, but the library fails to load entirely due to several syntax and
scripting errors. I need the PVTCollectors package in particular for my research
on PVT-assisted heat pump systems.

Errors

[C:.../IDEAS/Examples/PPD12/Structure.mo: 531:21-531:686]:
Lexer treating \ as , since \e is not a valid Modelica escape sequence.

[C:.../IDEAS/Examples/PPD12/Structure.mo: 531:21-531:694]:
Lexer treating \ as , since < is not a valid Modelica escape sequence.

[C:.../IDEAS/Fluid/PVTCollectors/Validation/PVT_UI/PVTQuasiDynamicCollectorValidation.mo: 7:5-7:10]:
No viable alternative near token: break

[C:.../IDEAS/Fluid/PVTCollectors/Validation/PVT_UN/PVTQuasiDynamicCollectorValidation.mo: 7:5-7:10]:
No viable alternative near token: break

Failed to load package IDEAS () using MODELICAPATH C:/.../IDEAS-master/

Questions

1. Is IDEAS v4.0.0 / master branch officially supported or tested with OpenModelica?
   If so, which version of OpenModelica is recommended?
2. The break keyword in PVTQuasiDynamicCollectorValidation.mo (line 7)
   seems to cause a fatal parse error in OpenModelica. Is this a known issue
   and is there a workaround?
3. As a fallback I am currently using IDEAS 3.0.0, which loads but has its own
   compatibility issues
   Ideas 3.0.0 Errors:
   _[862] 11:38:32 Scripting Error
   [C:/Users/User/Documents/Masterproef/IDEAS-3.0/IDEAS/Buildings/Components/Interfaces/RectangularZoneTemplateInterface.mo:441:7-441:23:writable] Error: Variable hasCavity not found in scope RectangularZoneTemplateInterface.

[863] 11:38:32 Scripting Error
[C:/Users/User/Documents/Masterproef/IDEAS-3.0/IDEAS/Buildings/Components/BaseClasses/ConvectiveHeatTransfer/ExteriorConvection.mo:9:24-9:40:writable] Error: Variable linearize not found in scope ExteriorConvection.

[864] 11:38:33 Scripting Error
[C:/Users/User/Documents/Masterproef/IDEAS-3.0/IDEAS/Buildings/Components/BaseClasses/ConvectiveHeatTransfer/ExteriorConvection.mo:9:24-9:40:writable] Error: Variable linearize not found in scope ExteriorConvection.

[865] 11:38:33 Scripting Error
[C:/Users/User/Documents/Masterproef/IDEAS-3.0/IDEAS/Templates/Interfaces/BaseClasses/HeatingSystem.mo:13:24-13:42:writable] Error: Variable InInterface not found in scope HeatingSystem._

Is there a recommended stable release for use with OpenModelica?

[LoneMeertens]

@Sen-Swaegers, Thanks for reporting this issue and for the clear description of the errors you encountered.

I tried to address the OpenModelica syntax problems in the following branch:
https://github.com/open-ideas/IDEAS/tree/issue1482_OMSyntaxErrors

Changes

• Removed the unsupported break keyword in the PVTCollectors validation model (PVTQuasiDynamicCollectorValidation.mo), which caused a parser error in OpenModelica.
• Adapted the reference path in the documentation of the Examples.PPD12.Structure model to avoid the invalid escape sequence warnings during parsing.

Could you try loading the library from this branch and check if it resolves the issues on your system with OpenModelica 1.25.5?

If this works for you, I will proceed with creating a PR to merge these fixes into the master branch.

Also worth mentioning: the PVTCollectors package is currently being updated. You can follow that work here:
#1481

In that update, the PVT collector model is being revised from the ISO 9806:2013 formulation for thermal performance to the more widely used ISO 9806:2017 formulation that is currently used in most PVT collector datasheets.