In Operation Dahboard I'm trying to use a simple Indicator widget to summarize area from a polygon layer in my webmap (using SHAPE AREA FIELD)
The SHAPE AREA FIELD is visible either in the mxd either in the map service and AGOL webmap: I can also see it in Operations Dashboard widget properties panel but when i use the SUM option with tthe SHAPE-AREA field nothing appears but a message error (yellow triangle in preview): impossible to access the data.
Same thin if i chose minimum, maximum o r standar deviation options
If I make the same thingswith other numeric fields the widget works properly.
Any Suggestion???