Order getting into Backordered status

Hi All,

I created an SO and booked it and also progressed the order. Being Line status as 'Awaiting Shipping', i Pick Release the order. But the order goes into Backorder state.

As per my knowledge lines to get Backorder has few conditions to consider like

-Item quantity should be available in the Inventory

-Periods to be open for the particular warehouse/Organization

-Not enough Quantity to Reserve/Transact

-No holds applied

Checking all the conditions, still it is getting Backordered.

Can you please help me on this issue.

Thanks,

Ashish