XGetTextProperty can generate BadAtom and BadWindow errors. The string name of the machine on which the client application is running. The name to be used in an icon. The server failed to allocate the requested resource or server memory. BadAtom A value for an Atom argument does not name a defined Atom.
Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. BadWindow A value for a Window argument does not name a defined Window.