Adding a value to multi value field

I thought this would be an easy change, but for some reason my formula code isn’t working. All I want to do is add a value to the multi-value Authors field. Here is my code within an agent.

FIELD Authors := Authors : “NM-EDE”;

I want to retain the values I already have in the Authors field, and just add “NM-EDE”.

Should be easy but I’m drawing a blank…

Subject: Adding a value to multi value field

That is correct, but what happens after the code runs?

and how is the code being triggered?

Subject: RE: Adding a value to multi value field

I select the document(s) in the client that I want this code to run on. I run the agent, then after it runs I check the document properties, but the Authors field does not have the “NM-EDE” added.

Subject: RE: Adding a value to multi value field

Permissions, Authors field - Does the agent Runner have permissions to update the document?

Subject: RE: Adding a value to multi value field

Thank you! I just changed the security level in the agent properties. Worked fine.