Find the column reference here:https://marketing.adobe.com/resources/help/en_US/reference/datafeeds-reference.html

Thanks for the reply. A follow-up question: would this require Target being implemented in the authenticated channel? Currently we don't have Target in there, but we do have the Experience Cloud ID Service and Analytics of course.

I have since found a solution for this. It was because the segment was based on a success event that had visibility set to "builders". When I switched it to "visible everywhere" the error disappeared. But I agree it looks like a bug, so I've submitted it to Customer Care.

As far as I know it's not available in Workspace by default, but you can add a processing rule to populate a prop or eVar with it:

You can override the Adobe report suite using a data layer variable and an extension in Tealium.See the Tealium help documentation here: https://community.tealiumiq.com/t5/Tags/Adobe-Analytics-SiteCatalyst-Tag-Setup-Guide-for-Tealium-iQ-Tag/ta-p/664So what you would do is:Create a data layer variabl...

Is there then any other way to set up a simple numeric value to use in analysis workspace? It seems odd that the old function is deprecated when the new function doesn't work yet (numeric 2 is in beta, and doesn't work in workspace).

I have marked the original answer by joshd as correct, but the discussion has been really helpful, so thanks for that. Looks like I'll have to come up with a better way, given the downsides that have been pointed out about using VISTA rules.