Move Order - Allocate

Hi All,

This is my first ever post so forgive me if I dont give enough info.  We are in the process of upgrading from 11.5.10.2 to 12.1.3.  We currently use OPM Inventory, but as you know that gets converged in R12.  We have a current process that we use to manually allocate lots for sales orders.  From what I've been reading, it doesn't exactly act the same in R12.  I'm trying to see how R12 functionality works but when I go to the Transact Move Order screen for one our open sales orders and click allocate, the move order line disappears.