The --getopenfilename option followed by a colon and label name does not work as expected. Two times a pop up window appears saying "The file or folder does not exist" and it seems it just looks for the ":labelname" as a filename... It should work differently according to: https://techbase.kde.org/Development/Tutorials/Shell_Scripting_with_KDE_Dialogs I'm on OpenSUSE Tumbleweed / KDE Plasma 5.13.4
Probably got lost in the port to QDialog. David?
Confirmed still an issue with kdialog 20.08.3