I was getting the following error on deployment for no reason:
"An unhandled exception of type 'System.IndexOutOfRangeException' occurred in Engine 02.exe"
With the bold bit highlighted in RuntimeXNA.OI.COILust
public COI getOIFromHandle(short handle)
public COI getOIFromIndex(short index)
I managed to work out that it was happening to any file I built in MMF2, not just that Engine, and thankfully an MMF reboot fixed the problem.
Might be worth looking into? It started happening after I took a screen capture from VS2010