ok now this is really weird.
i have comment out the line as you wrote ("tveCities.SetTreeViewCellFactory("tvCities")")
and run the jar on my PC (windows).
i am building the app in release mode and i open Objects Folder and run the jar.
everything works BUT if i move the file to the DESKTOP or to any other directory it will not open.
i will try to restart my PC and see if it works and then try on the Mac. will tell you in few minutes
i have comment out the line as you wrote ("tveCities.SetTreeViewCellFactory("tvCities")")
and run the jar on my PC (windows).
i am building the app in release mode and i open Objects Folder and run the jar.
everything works BUT if i move the file to the DESKTOP or to any other directory it will not open.
i will try to restart my PC and see if it works and then try on the Mac. will tell you in few minutes