Why is the word "CONCAT" displaying in labels on my map?

AllenDailey1 — Wed, 24 Sep 2025 23:58:42 GMT

I'm having a weird problem with labels in ArcGIS Online map viewer.

I published a map service from ArcGIS Pro to our standalone ArcGIS Server. Then a web map in ArcGIS Online contains layers from the map service.

I configured the layers' labels in Pro (Pro version 3.3). I used a Python expression for the labels:

Many months ago when I first published the service, the labels worked fine in ArcGIS Online. But I happened to discover today that now the labels show up in Map Viewer as the literal text contained my Python expression, but with the "+" replaced by the word "CONCAT".

Label should be: District 1
Label shows up as: "District" CONCAT 1

Why???

Any ideas of what to do about this? I would really prefer to configure labels in Pro rather than the AGOL Map Viewer, so that I don't risk labels getting wiped out when I republish the map service.

Thanks for reading!

Re: Why is the word "CONCAT" displaying in labels on my map?

DanPatterson — Thu, 25 Sep 2025 00:40:27 GMT

well, esri says use arcade

BUG-000158454 for ArcGIS Pro

because it won't be addressed

Re: Why is the word "CONCAT" displaying in labels on my map?

AllenDailey1 — Thu, 25 Sep 2025 15:35:02 GMT

Thank you so much for sharing this! I had tried a couple different google searches on this topic, and I searched Esri Community, but I never found info about this bug. Thanks.

topic Re: Why is the word "CONCAT" displaying in labels on my map? in ArcGIS Online Questions

Why is the word "CONCAT" displaying in labels on my map?

Re: Why is the word "CONCAT" displaying in labels on my map?

Re: Why is the word "CONCAT" displaying in labels on my map?