6702 Translation from/to a character string with an invalid character set specification was requested of the ISF subsystem.
The ISF subsystem has detected a client character set which is invalid, or not loaded. It is likely that the character set was passed in the system message header. The TDP, or gateway, may not be operating properly.
The ISF subsystem. Most likely the isfcalc routine.
Try resetting TDP by issuing .SET SESSION CHARSET <charsetname> command (if you use BTEQ). <charsetname> must be a valid character set. ASCII & EBCDIC are guaranteed to be valid. If this doesn't help, contact your Support Representative.