OK so it looks like a lot of people have overlooked some info in the upgrade.txt for Mystic at or around the A47 mark, so I will make some lives easier by describing the issue and how to fix it.
Firstly, this only really applies to anyone using Mystic A47+ and the IBOL client, there’s a feature in IBOL that allows you to scroll back through the message history however since A47 Mystic uses a new ansi viewer, and the configuration is done now with an ini file. So save time, here’s the link to a default ini file modified to work with IBOL.