One might say that a "token" longer than 10 characters at the beginning of a message is not a message ID.
Another place where the limit is "used" is in National Language Support. NLS skeletons provide room for only 10 characters for the message ID. Another place is the MSGID parameter of the SLIP command which includes the documentation "The input MSGID can be a maximum of 10 characters". Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
