ArcGIS Pro Report Expression Not Reading Joined Field Correctly

dnieves — Tue, 07 Jul 2026 15:55:49 GMT

Hello, I am creating a report in ArcGIS Pro and using an Arcade expression to group two field values into a single label. The field I am referencing comes from a spatial join.

I have also tried other alternatives such as using what if statements.

The expression returns nothing. So how should joined fields be referenced inside report expressions? Do joined fields need a specific syntax in Arcade when used in a report?

Thank you!

Re: ArcGIS Pro Report Expression Not Reading Joined Field Correctly

Robert_LeClair — Wed, 08 Jul 2026 14:34:33 GMT

Joined fields should be referenced in Arcade using bracket notation and the fully qualified table.field name:

var a = $feature["JoinTableName.FieldA"]
var b = $feature["JoinTableName.FieldB"]
return a + " / " + b

This is the documented syntax for joined fields in Arcade: $feature['tablename.fieldname'] (same Arcade field access rules apply).

If your expression returns nothing, the most common causes are:

You used $feature.JoinTableName.FieldA (dot syntax won’t work for joined fields).
The join table name in the layer is not what you think (it may be an alias or auto-renamed). Use the exact qualified name shown in the layer’s attribute table fields list.
The “joined” values aren’t actually present (no match in the join), so the joined field is null.

Also, if you’re using a temporary/in-memory join, consider writing the join results to a new dataset (for example, run Spatial Join to create an output feature class) so the report is reading physical fields rather than a live join.

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ArcGIS Pro Report Expression Not Reading Joined Field Correctly

Re: ArcGIS Pro Report Expression Not Reading Joined Field Correctly