During upgrade to Adaptive Server 15.0.3 you should have created a restore_msgs.ebf file. Now you must run this script to restore your messages back to the version from which you upgraded.
isql -Usa -P <sa_password> -S <server_name> -i <restore_msgs.ebf>
If you upgraded from a 15.0 or 15.0.1 release and are
reverting back to the 15.0 or 15.0.1 release, then you must only
run instmsgs.ebf file from the relevant release.
