Hi @Adelaida,
What makes you think that DESC_SCENARIO is considered a number?
If the reason is because you see the letter n in the expression (e.g. 'DESC_SCENARIO'n), this doesn't mean a number. This n indicates a named data item, which could be calculated or not. These are valid syntax in expressions:
'DESC_SCENARIO'n --> a data item (numeric or character)
'DESC_SCENARIO'p --> a parameter (numeric or character)
'DESC_SCENARIO' --> a string
Best,
Renato
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