Attribute Rule Error : Field Not Found, but attribute is there

Question

I am running a geoprocessing tool that updates tables and feature classes. However, the tool unexpectedly fails with an error Attribute Rule Error: Field Not Found. However, this field is present in the feature class. After looking through the Arcade Expression, the name of the field and feature class are correct. How can this issue be resolved?

GaneshPremakumar · Answer

Hi, this is a custom tool I wrote to perform some attribute updates on points and lines. It is a RunTimeError Failed to evaluate Arcade Expression. The error number is 0, with arcade error "Field not found " on update event. The expression just has a few if else conditions that check if $feature. is some value and returns some calculated value. Thanks!

DanPatterson · Answer

which tool? was there an error number? what was the expression?

visuals might help