The Scrub Message module (scrubmsgs.js) may be used (e.g. executed via JSexec) to scan through one or more message bases (e.g. sub-boards) and remove illegal control characters from specific message header fields (e.g. to, from, subject, etc.).
If you receive the chksmb error (Header field contains control characters) for one or more messages in a message base, this script is designed to resolve that issue.
jsexec scrubmsgs [-debug] [-scan] <sub-code> [sub-code] [/path/to/subfile]
The -debug option will cause scrubmsgs to output a lot of detailed status messages you likely do not need to see.
The -scan option will cause scrubmsgs to just scan a message-base for any corrupted header fields (i.e. containing illegal control characters) and not actually perform any modification of the message (no “fixes” applied).