Hello Norman

On 27.06.2018 15:15, Norman Feske wrote:

just as a shot in the dark, could it possibly be that the "layout_controller" closes the report session right after submitting the report, e.g., by using a 'Reporter' as a local variable that is destructed when leaving its scope?

Yes, this is the problem. It uses an Expanding_reporter inside the method that creates the configuration.

Many thanks, Pirmin