Windows Mapguide 2.6.1 Maestro 6.0a3
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i think it miss a right parenthesis in your expression and I think you must
quote your expression like this,
I validate this with MapGuide 2.5.2
IF('NOT LIBELLE2 NULL',CONCAT (LIBELLE1, LIBELLE2),'Nothing') )
Rémy
De : lucvanlinden [via OSGeo.org]