Using Scripted Fields for strings

Hi, thanks for the reply but unfortunately- No Luck ...

so- the field is just searchable, not aggregatable- may this be the issue? how can I change that?

Language: painless - Yes
Type: string - Yes
Format: -default- - Yes
Popularity: 1 or greater just makes it rise up to the top in the field list on Discover so it's easier to find if you have a lot of fields- Yes
Script: doc['TigerLayer.keyword'].value -Yes

and yes- I filtered the results to show only the entries where TigerLayer exists...
I also tried the script on the host field and failed (BTW, host field is not aggregatable as well).

Any other ideas?