Better error message for formula tool

[SeanAdams]

If you forget to put a name on a new column in the formula tool - the error message is 

The field "" is not contained in the record. (Expression #1)

Please could you replace this with a user-friendly message which is self descriptive like:

"Please provide a name for the new column created in expression 1"?

[Joe_Lipski]

I would go one step further and suggest the formula tool created a new field called Field_X like it does for Text Inputs etc. with a warning, rather than just error

[KylieF]

Thank you for your feedback!

Better error messages on the formula tool is something we would like to include into the product in the near future! While we can't provide a timeline on this request as this point, I'm updating this idea to Accepted to reflect this change. We'll be sure to update this idea again once we are near the release of this feature into the product.

[NicoleJ]

Updated message in 23.1 release!

Now more helpfully lets you know: 

Select an existing Output Column to update or add a new column (Expression #__)

Hope that helps!