ERROR 001841: the Class was not Found%s

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05-13-2021 02:42 PM
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JimWilliams
New Contributor III

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

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DanPatterson
MVP Esteemed Contributor
JimWilliams
New Contributor III

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

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