Arcade Data Expressions: Unable to execute Arcade script

[JennyKuan]

Hi,

Can anyone provide some insight as to why I am unable to execute my Arcade Expression? I can successfully test it but it will not let me execute it. I just learned how to use Data Expressions today with help from this community so I am very green. 

Here's what my data expression looks like, while returning the correct number for "Count":

var features = FeatureSetByPortalItem(Portal('https://arcgis.com'), '5a735badf3114a3ba63e2a01b3cb1a68', 0, ['ACTIVE_ELE'], false);
Count(Features);

Then, when I press done and return to the previous page, I get this message:

This isn't the final script I want to use but I'm just playing with things for the time being. 

Thank you!

Jenny

[DavidPike]

Hi Jenny,

The expression must return a FeatureSet.  https://doc.arcgis.com/en/dashboards/get-started/create-data-expressions.htm 

If you just need a count in something like an indicator, I'd just have the expression return the featureSet as-is, then have a Count on the indicator.

https://developers.arcgis.com/arcade/guide/types/?rsource=https%3A%2F%2Flinks.esri.com%2Fdashboards-...

https://doc.arcgis.com/en/dashboards/get-started/create-data-expressions.htm

https://github.com/Esri/arcade-expressions/tree/master/dashboard_data?rsource=https%3A%2F%2Flinks.es...

https://doc.arcgis.com/en/dashboards/reference/authoring-data-expressions.htm