Not able to pick the items

[Murthy Neelam]

Hi,

    I tried to pick 11 items from inventory in which 2 items doesn't have
the quantity only 9 items are picked.

Then i have added qty for the remaining 2 items also. when i tried to pick
the 2 items again iam not able to pick.
its showing the following ERROR "ERROR: No inventory reservations
available; cannot pick this item".

Thanks & Regards,
Murthy