y cant the groupcode load ?
Group Codes on first screen are for Products. You are editing Inventory Items on second screen and they have their own group codes. For example Beverages, Burgers for products, Meats, Oils for inventory items.
thanks…still need to understand the working of POS
is there a guide or manual to understand the system better or for user like us will have to disturb you 
You can search a lot of things on the forum. If there is anything you cant find or stuck just create a post and there are a lot of great helpful people who will respond.
yeah i appreciate…i have been getting help