This has happed a few times to in the last 24hrs so I thought I’d report it.
When I tried to use this formula
Parameter 2 of function IN is of the wrong type
Which isn’t very intuative because all that was wrong was that [CableID] should have been [Cable ID]
IN([_ThisRow].[Cable Name],[Cable ID])
I can imagine someone getting hung up on this for an hour or so and presume its a simple fix