[Wesley221]

You open a function, but dont close it.

pawn Code:

if(strcmp("/aflip", cmdtext, true) == 0)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            if(GetPlayerScore(playerid, 100))
            {
                new vehicle;
                new Float:zangle;
                vehicle = GetPlayerVehicleID(playerid);
                GetVehicleZAngle(vehicle,zangle);
                SetVehicleZAngle(vehicle,zangle);
                SendClientMessage(playerid, COLOR_NAVY, "[APS]Vehicle Flipped");
                return 1;
            } else return SendClientMessage(playerid, COLOR_NAVY, "You dont have 100 score!");
        } else return SendClientMessage(playerid, COLOR_NAVY, "Youre not in a vehicle");
        return 1;
    }

Also, may i suggest you should use ZCMD, since its faster then strcmp & its easier to use?