First ..... That map is not set up as a "river assault" map therefore the game won't supply rafts for your men. You can check that by loading it into the editor and press the ^ key and it will give you the option of making it a river assault map which sets the flags for the game to provide rafts
Second, you generated meeting engagement, again.... not a river assault so no rafts are provided at the start of the game
Don
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"You are never to old to rock and roll if you are too young to die".--- What do you expect to be doing when you are 80?