What is causing my calculated expression to not work in Map Viewer/ExB when it works great in Field Maps?

marksm_macomb — Mon, 09 Feb 2026 18:57:50 GMT

I have a field map that involves multiple relationships between different point/polygon features and one inspection table. I'm using calculated expressions in my smart form for the inspection table to pull ID's and locations from the parent feature. When I try to add an inspection record in Field Maps, the calculated expressions work as expected, but when I try to add an inspection record in Map Viewer or with the edit widget in an ExB, an error pops up saying it cannot be calculated.

Here is my Arcade:

var InletParent_id = $feature.InletParentGUID var ManholeParent_id = $feature.ManholeParentGUID var DischargeParent_id = $feature.DischargeParentGUID var StructureParent_id = $feature.NetworkStructParentGUID var related_Inlets = FeatureSetByName($map, "Stormwater Inlet - MS4",['GlobalID', 'FACILITYID'], false) var related_Manholes = FeatureSetByName($map, "Stormwater Manhole - MS4",['GlobalID', 'FACILITYID'], false) var related_Discharge = FeatureSetByName($map, "Stormwater Discharge Point - MS4",['GlobalID', 'FACILITYID'], false) var related_Structure = FeatureSetByName($map, "Stormwater Network Structure - MS4",['GlobalID', 'FACILITYID'], false) Var parent_Inlet = First(Filter(related_Inlets, 'GlobalID = @InletParent_id')) Var parent_Manhole = First(Filter(related_Manholes, 'GlobalID = @ManholeParent_id')) Var parent_Discharge = First(Filter(related_Discharge, 'GlobalID = @DischargeParent_id')) Var parent_Structure = First(Filter(related_Structure, 'GlobalID = @StructureParent_id')) if(parent_Inlet == null){ if(parent_Manhole == null){ if(parent_Discharge == null){ if(parent_Structure == null) { return "N/A" } else { return parent_Structure.FACILITYID } } else { return parent_Discharge.FACILITYID } } else { return parent_Manhole.FACILITYID } } else { return parent_Inlet.FACILITYID }

Had anyone else run into this and are there any workarounds?

Re: What is causing my calculated expression to not work in Map Viewer/ExB when it works great in Field Maps?

EmilyGeo — Wed, 11 Feb 2026 16:41:51 GMT

Hi @marksm_macomb,

Can you share a screenshot of the error message? Do you see any error messages in the console in dev tools?

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What is causing my calculated expression to not work in Map Viewer/ExB when it works great in Field Maps?

Re: What is causing my calculated expression to not work in Map Viewer/ExB when it works great in Field Maps?