I am trying to set up a Field Map which can auto-populate an inspection field in a related table from an existing point
I created the Relationship Class - we can call 'Rel_Name'
Then in Attribute Rules for the table I created a Calculation rule as follows:
"var parent = FeatureSetByRelationshipClass($feature, 'Rel_Name', ['Field_Name'])
return First(parent)"
Validating throws the following error - "Invalid expression. Error on Line 1. Unknown Function."
Can anyone advise?