Davepar -
The frontend callback runs independent of any UUT sequence execution. I would assume that you could assign this string value to a station global, like StationGlobals.MyString. If you add a new column to the UUT Results database, and add a new column definition to the schema for the UUT Results statement in the Database Logging Options dialog box, the value expression for that new column could just reference that station global, StationGlobals.MyString.
Scott Richardson (NI)
Scott Richardson
https://testeract.com