topic Re: ERROR 001841: the Class was not Found%s in ArcGIS Pro Questions

ERROR 001841: the Class was not Found%s

JimWilliams — Thu, 13 May 2021 21:42:21 GMT

Hello,

I see there are a few other questions about his error, but I didn't see anything telling me what the really is causing the issues here. I am using a view in a attribute rule to get a feature set that I use a filter on to get a subset.

Can I use a view in a attribute rule, or does featuresetbyname work for a view?
What does "Class was not Found%s" mean? Is this a feature class that is not found, are there null values in the attribute rule?

var quad = $feature.Quadrant; if ($feature.Quadrant != null) { var System_valve_set = filter(featuresetbyname($datastore, 'Valve', ['OBJECTID', 'WATERVALVETURNING_STATUS', 'GRID_NUM'], true), Concatenate(["GRID_NUM = ", quad], '')) var Valves_Exercised_This_Year = filter(featuresetbyname($datastore, 'Valve_Exercised_This_Year', ['OBJECTID', 'Status', 'GRID_NUM'], true), Concatenate(["GRID_NUM = ", quad], '')) var cnt = count(System_valve_set) // make the query for each possible situation where there could be a feature set that is null if (Valves_Exercised_This_Year != null && cnt > 0) { var query = "Status = 'Closed'" var System_closed_valve_set = filter(Valves_Exercised_This_Year, query) var result = count(System_valve_set) - count(System_closed_valve_set) return result } else { return null } } else { return null }

regards,

Jim

Re: ERROR 001841: the Class was not Found%s

DanPatterson — Fri, 14 May 2021 00:54:40 GMT

Two links on Tech Support with that error

BUG-000126594: Attribute rule returns the error, "Error 001841: The.. (esri.com)

ArcGIS PRO 2.1.3 brought new defect - ERROR 001841... - Esri Community

Re: ERROR 001841: the Class was not Found%s

JimWilliams — Fri, 14 May 2021 16:52:22 GMT

Hey Dan,

Thank you helping me out again. The first link you shared with me was correct. Removing the comments resolved the issue. Now I just get a error saying it cant find the view. I will assume that you cant use views in Arcade.

The link to the BUG just for reference:

BUG-000126594: Attribute rule returns the error, "Error 001841: The.. (esri.com)

Regards,

Jim