I hate to go over the subject again, but for a long time, I have'nt been able to do what it says that can be done: Open the first tab. The instruction above says that you can add several commodities to the same queue, and you can increase the size. So you add your "general Goods" and put a value; Tons or units. Then I add another commodity and try to put a value. 0. It stays at zero! You increase the size to a million, and still, it is 0. Obviously I am doing something wrong. You can go to the following tabs and configure everything, and still on the first Tab you can't add more commodities as if they don't have a value, it will not at least unload. Of course you can go to another Queue and add the commodity there, but if so, you'll have only 6 products to work with as there are 6 Queues. Again, what am I doing wrong?