The The relation or constraint attribute @ERROR is attribute @ERROR is used in an expression to present an error message if an evaluation error occurrs.
Place @ERRORPlace @ERROR:Expression in the data slot of the relation or constraint
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Also look at the ERROR$() function and the @ONNOVALUE attribute for error trapping.
Member of functional group: Modeling
Member of knowledge base type: Classic and general type, Scenario type and Taxonomy type
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