Client groups connected remotely to a server, are not generating any
birth events on the server. The server therefore thinks that the Group
does not exist ...
This bug is present since 1.5.
Currently building a logic to go "around" that problem using other
functions (the coalition:getPlayerUnits() is key for resolvement)
Now MOOSE can be copied into the mission file, but you'll need to
include a "do file" action of moose.lua in the mission file and copy the
rest of the MOOSE files to the MIZ file.