Setting up an attribute rule on Update, with the intent that an edit in this feature class will find and change a row in a table. Think in terms of trying to track when a valve or a circuit in a system is temporarily changed from its normal setting - trying to track ones that have been changed and when they go back to normal. The "change" portion of the process has been implemented successfully in a different rule. This is intended to find a row in the table with the GlobalID from the feature class and a Temp Start Time, but no Temp End Time - the edit will "close out" that record by fill in the Temp End Time.
Errors are coming from line 21 of this screenshot, with the message: "Indexable type expected."
