Have you ever had this happen? You are in an open Dispatch and try to request spares, but the options are grayed out?
Under your individual Area detail options menu, you will notice an option entitled, "Restrict Spares Issues to Default or Secondary Warehouses." When you have this option checked, and you do not have a Default Spares Warehouse Selected, any Dispatch within that Area will be restricted to the default warehouse. This is the problem, because in this case, there is not a default warehouse.
Resolve this issue by un-checking (disabling) this option if you do not utilize Default and Secondary Warehouses.