hmmm.....should the convoy cont his way after something special happened? Saying the enemies were retreated?
However, could move getWPpos [convoy,1] be a solution?
called in a script or a second radio command?
:edit
made a little mistake...set a groupname for your convoy...say groupAlpha then the the commands should look like:
groupalpha move getWPpos [groupAlpha,1]
the 1 stands for the waypoint you mean.