If that doesn't work, then the next option is to use a select member button.
Did you try using the Member Tree component? The parameter will be a member list parameter. (Not sure whether you need .TreeDescendants as the expansion. I can't remember that part now.)
Thank you! I have tried a member tree component with member list as a parameter but just get an empty box. The same parameter assigned to a combo box gives me a list as expected. I attach the printscreens here. Can I kindly ask you to check if I am I missing anything in the set up?
If that doesn't work, then the next option is to use a select member button.
