Flipping to Desktop Niggle

[Lamaman1971]

Hi Folks, this doesnt happen often but once in a while with a frantic two player session on my cabinet an as yet undetermined key sequence seems to flip my game back to Windows 7 desktop. Im using the bog standard mame keys everywhere, so player one is rife with ALT, CTRL and Shift. That said, I cant seem to figure out what the combination is. Any ideas?

[markc74]

Don't know what encoder you're using but on my mini PAC holding down p1 start and pressing p2 start sends the ESC key which exits out of mame....

[Lamaman1971]

Using the iPac Ultimate IO - so nothing unusual. I know the shift key on Player 1 Start can be a problem but during game play then its just the usual P1 and P1 U/D/L/R and the first six buttons for each player. Having checked the corresponding key codes I can only assume that its a combination of one or more Player One :

L-ALT
L-CTRL
L-SHIFT

and one (or more) of the letter keys for player 2 (and the remainder of player 1).

Very odd, and difficult to re-create which is a pain.

[Lamaman1971]

Ok - found the answer to this - its the RocketLauncher exit script key combination giving me a headache!