Hello! - I am using WIP and routing in NS. I am entering a completion with Backflush, which is debiting my WIP account, but there is no posting lines that credits WIP, and hits my finished good. What am I doing wrong?

Hey! That's weird cos backflush completions should definitely be crediting WIP and debiting finished goods inventory. Make sure your finished good item has the right costing method and GL accounts set up. Also check if the routing operation is marked as "backflush" properly and verify the WO status allows completions to post to GL. Sometimes the GL impact gets deferred if there are pending costs or if the item isn't set up right. Check your transaction search to see if there are any pending postings.

So, I figured this out. When using average cost, a backflush completion does not use the WIP amount to credit WIP, it uses the last purchase price of the assembly item! In my case, that assembly had not been purchased, so there was no cost to credit WIP, therefore, no GL impact. There is an accounting preference setting for using the WIP amount, rather than the last purchase price, but this is not turned on by default. So once I enabled that preference, the proper WIP amount was credited on the backflush completion.