The issue is shown in the attached video.
When I create a new result combination, RFEM displays a message saying that all Concrete Design results will be deleted. This happens even though the new result combination is assigned to a Design Situation that is not used for Concrete Design.
There should be no link between this result combination and Concrete Design, yet the program still forces deletion of the design results. This appears to be a bug. Please check and correct this behaviour.