The source of this message is the holidays set used for your personal calendar, as specified in the calendar preferences.
The cause of this message is that someone deleted this holidays set from the shared database.
➢This message only appears if the holidays set has been deleted. Renaming or moving the holidays set in the list of holidays sets will not trigger this message.
There are no immediate production consequences, as this message only applies to the user interface of Q++Studio, not to any data or output files being generated.
Solution
•Select another holidays set for your calendar.
Topic 153600, last updated on 22-Mar-2021