36         quit("!IsGUIOn: invalid GUI number specified");  in IsGUIOn()
51     quit("FindGUIID: No matching GUI found: GUI may have been deleted");  in FindGUIID()
57     quit("!GUIOn: invalid GUI specified");  in InterfaceOn()
77   if ((ifn<0) | (ifn>=game.numgui)) quit("!GUIOff: invalid GUI specified");  in InterfaceOff()
98     quit("!SetGUIObjectEnabled: invalid GUI number");  in SetGUIObjectEnabled()
100     quit("!SetGUIObjectEnabled: invalid object number");  in SetGUIObjectEnabled()
107     quit("!SetGUIObjectPosition: invalid GUI number");  in SetGUIObjectPosition()
109     quit("!SetGUIObjectPosition: invalid object number");  in SetGUIObjectPosition()
116     quit("!SetGUIPosition: invalid GUI number");  in SetGUIPosition()
123     quit("!SetGUIObjectSize: invalid GUI number");  in SetGUIObjectSize()
126     quit("!SetGUIObjectSize: invalid object number");  in SetGUIObjectSize()
133     quit("!SetGUISize: invalid GUI number");  in SetGUISize()
140     quit("!SetGUIZOrder: invalid GUI number");  in SetGUIZOrder()
147     quit("!SetGUIClickable: invalid GUI number");  in SetGUIClickable()
155     quit("!SetGUITransparency: invalid GUI number");  in SetGUITransparency()
162     quit("!CentreGUI: invalid GUI number");  in CentreGUI()
170     quit("!GetTextWidth: invalid font number.");  in GetTextWidth()
178     quit("!GetTextHeight: invalid font number.");  in GetTextHeight()
188     quit("!GetFontHeight: invalid font number.");  in GetFontHeight()
195     quit("!GetFontLineSpacing: invalid font number.");  in GetFontLineSpacing()
201     quit("!SetGUIBackgroundPic: invalid GUI number");  in SetGUIBackgroundPic()
247         quit("!SetTextWindowGUI: invalid GUI number");  in SetTextWindowGUI()
251         quit("!SetTextWindowGUI: specified GUI is not a text window");  in SetTextWindowGUI()