[2008/08/28 12:07:12-975-x10]: Sink-1.0-79983 (Prat):226: attempt to index global 'MikSBT' (a nil value)
AceEvent-2.0-66043 (Ace2):695: in function <Interface\AddOns\Ace2\AceEvent-2.0\AceEvent-2.0.lua:682>
<in C code>: ?
AceEvent-2.0-66043 (Ace2):368: in function <Interface\AddOns\Ace2\AceEvent-2.0\AceEvent-2.0.lua:345>
Reinstalling Prat won't have any effect. If you don't care about your Prat settings, you could delete your Prat savedvariables files.
What I'd probably do is go through your active Prat modules' settings in-game and look for any modules that have a setting to output to MSBT/SCT/Parrot/etc. and make sure they're set to SCT instead of MSBT.