3575 Invalid character set in system message header.
Host sent an invalid charset in the system message header. Most likely TDP is not operating properly.
ParDrivr, DisDCR or CON modules that receive messages directly from the host.
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.