Hi Im trying to create my first attribut rule. Im using ArcGis Pro 2.5
When validating the following code
var area= FeatureSetByName($datastore,"TestArea")
var fs = Contains(area,$feature)
var res = First(fs)
It fails with this message
Error on line 3.
General evaluation error
If i Change First to Count, i do not get a validation error. Why can i not use first?