...I just tested my code and it didn't work...strange. I did find something that I know works, though. In the On Activation field for the Get In waypoint for grpAlpha, enter:
GrpAlphaIn=true
Do this for the other groups in their Get In waypoints:
GrpBravoIn=true
GrpCharlieIn=true
Then, in a trigger, put the following in the Condition field:
GrpAlphaIn and GrpBravoIn and GrpCharlieIn
On Activation:
Variable=true
-Pilot