Can't locate object method "new_text" via package "Gtk2::ComboBox"

["Eisenknapp, Josef" <josef eisenknapp siemens com>]

Hello

 

I wrote a program useing a Gtk2::ComboBox. On my computer at home everything works fine, but on the redhat computer in the office keep getting the message:

 

"Can't locate object method "new_text" via package "Gtk2::ComboBox" (perhaps you forgot to load "Gtk2::ComboBox"?)........"

 

 

I have a similar problem with the "->set_keep_above (TRUE)" method for a window.

 

 

Thanks

Josef