That might be related to using the Roland VSC DXi as your output MIDI Driver.
If that is the case, switching to the Coyote GM WT WaveTable (or another driver) would fix the issue. Either that, or just ignoring the exception message, as its harmless.

(the issue is a weird one, related to a video driver conflict, and is sometimes fixed by updating video driver)


Have Fun!
Peter Gannon
PG Music Inc.