You must run the instmsgs.ebf script after you upgrade from a 15.0 Adaptive Server to a 15.0.1 Adaptive Server. Run the instmsgs.ebf script immediately after runnning the installmaster script.
If you are a localized customer:
First run the instmsgs.ebf script, and then install any localized language using langinstall, sqlloc, or syconfig.
If you run instmsgs.ebf after installing the 15.0.1 localized message, this script may delete some new messages.