Well. Handling of combinations is situation when You have for example mug. White, blue, black, etc. You can't have stock for every color in one page, because all combinations is added together and you can see this number. But when You need to know how many each color you have, then what ? At least I haven't found place. But if You have 30 combinations for one mug ? And then You have for example plates, kettles, etc. There is also useful quantity, stock quantity, physical quantity ... shortly WTF ? In real life you need to know only two kind of quantity. How many you have in total and how many is reserved, that's all. With these you can find almost all other values. Finally I gave up with this ASM. And if this isn't working, then it is just useless ballast. But I have no knowledge how to fix it, I can only imagine that this can be real hell. I'm pretty sure that same thing is also with FIFO or WA.