Hi, When I follow http://www.gtk-server.org/GTK-server_Tutorial.html I get a segfault when I reach Chapter 7. GTK programming - the mainloop. and perform this: print "gtk_main_iteration" |& GTK; GTK |& getline When I instead follow http://www.gtk-server.org/GTK-server_Manual.html and do not call "gtk_main_iteration" at all, everything works fine. Is GTK-server_Tutorial.html outdated w.r.t. "gtk_main_iteration"? Cheers, Klaus PS Thanks for this great gtk-server.