Make sure nothing else is using the selected port. If your host is a Power Mac, this problem could occur if you have the serial nub installed on the host machine.
Make sure that all symbolic information compilation flags are turned on.
It will be displayed as assembly.
(TTE Index out of range) that type is not defined in the symbol file.
Please recompile with MPW 3.2 or later.
Try quitting other applications and try again.
Please recompile your application and specify the option to generate a symbol file.