UVL model cannot be read.

[YKraml]

The following model cannot be read by UVLModelFactory.java.
The UVL-Playground (https://uvl.uni-ulm.de/) can parse the model.

Error:

Multiple Errors occurred during parsing!

failed to parse at line 3:8 due to mismatched input 'CW' expecting {'<INDENT>', '<DEDENT>'} at line 3
failed to parse at line 4:16 due to mismatched input '                ' expecting {<EOF>, 'constraints'} at line 4

Model:

features
        ALL
        CW
                optional
                        CW_authentication
                        CW_autogenerate
                        CW_decisionboard
                        CW_documenation
                        CW_flatfilegenerator
                        CW_views
                                or
                                        "Table-based"
                                        "Tree-based"
                                        "Graph-based"
                        CW_requirementsView
                        CW_sharepoint
                        CW_wordgenerator
                                optional
                                        CW_wordgenerator_wordAddIn
                        CW_guidance
                                alternative
                                        "After-first-selection"
                                        Always
                        CW_resolution
                                alternative
                                        "1400x1050"
                                        "800x600"
                                        "1280x1024"
                                        "1900x1080"
                                        "1024x768"
                                        "1600x1200"
        Real CW_resolution_height
        Real CW_resolution_width
        DK
                optional
                        DK_builder
                        DK_merger
                        DK_metamodelling
                        DK_rulelang_editor
        DK_modelconverter
        DK_sharepoint
        PK
        SERVER
        ProprietaryTools

constraints
        ALL => DK & CW & PK
        DK & CW & PK => ALL
        DK_modelconverter => PK | DK
        DK_sharepoint => PK | DK
        ProprietaryTools => CW | DK
        "1400x1050" => CW_resolution_width == 1400.0
        "1400x1050" => CW_resolution_height == 1050.0
        "800x600" => CW_resolution_width == 800.0
        "800x600" => CW_resolution_height == 600.0
        "1280x1024" => CW_resolution_width == 1280.0
        "1280x1024" => CW_resolution_height == 1024.0
        "1900x1080" => CW_resolution_width == 1900.0
        "1900x1080" => CW_resolution_height == 1080.0
        "1024x768" => CW_resolution_width == 1024.0
        "1024x768" => CW_resolution_height == 768.0
        "1600x1200" => CW_resolution_width == 1600.0
        "1600x1200" => CW_resolution_height == 1200.0

[coemgen1992]

Note: UVLS in VScode lets you write the UVL model and configure.

[SundermannC]

Hi @YKraml,
thanks a lot for your report and apologies for the late response. In the latest publication on UVL (find preprint here: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4764657), we decided to enforce having one root feature for UVL. Under this property, the shown UVL model is not valid. UVLS's restrictions seem to be a bit more relaxed in this (and more) cases.
However, the very least, the error message should be more helpful, I think.
The second error message also seems very concerning.

[MiriamGaus]

Can this be closed?

[SundermannC]

I think it would be valuable to consider this for a potential overhaul of error messages. In general, the current error messages are often not really helpful to find the actual issue. Maybe we could also close this issue and create a issue dedicated to improving the error messages?