Runtime failure?
 

Hello all.
I have been running the fantastic new official patch 1.05, playing on ATAG.
All is good but I have encountered a new wrinkle. for the first time I had a runtime error and crash.
I was running the game simultaneously with Game Booster 3, to see if it would cure my CTD issue, which it seemed to have fixed.
System specs:
Windows 7 64bit
i7 2600K @ 4.4
GTX580SC (285.38 drivers)
8 gigs RAM
@1920x1080

As I said this is the first time Ive had a runtime error and crash. Any ideas as to what that means?