Sales order created, the schedule lines are confirmed for the delivery date and qty
order is not blocked for delivery
order is complete
still while creating delivery get a error message
An item with no delivery quantity is not permitted. Item will be deleted.
Message no. VL367
stock checked through MMBE that is also available in unrestricted use
Check this thread
[Re: Mesaage : while creation of delivery : An item with no delivery quantity|Mesaage : while creation of delivery : An item with no delivery quantity .);
In MMBE though the stock shows under Unrestricted column, it also includes delivery created and saved without doing PGI. So check in MD04 any delivery reference is flowing.