BADCHAR, XXX is not a valid character in the YYY encoding form.

Runtime Error: GT.M triggers this error when it encounters a byte sequence that is not legal according to the given character set of the current device.

Action: Either handle the illegal byte sequence or disable the triggering of BADCHAR error by VIEW "NOBADCHAR" command. If the error is from a READ or WRITE command, consider performing the I/O in M-mode. See Technical Bulletin—GT.M Support for the Unicode™ Standard ../GTM-Unicode/GTM_Unicode_Support.html for more details.