Error Messages Display error messages. These functions are used to display error messages. The output will take place in an error dialog and on stderr. Creates and shows normal, blocking error dialog. @text: Error message Creates and shows a non-blocking error message. @text: Error message Shows an error message with perror style information. @text: Error message Shows an error message with perror style information, non-blocking version. @text: Error message Shows a formated error message using a printf style argument list. @format: Message format string @Varargs: Argument list