The customer has requested complete delivery

What causes this issue?

The indicator 'complete delivery' has been set in the order, meaning
that all items relevant for delivery are to be sent in one delivery.
This indicator is either copied from the customer master into the order
header or is manually entered in the order.
Since it is not possible to deliver all items relevant for delivery in
one delivery, the system issues an error message rejecting the creation
of the delivery in the <LS>Sales Orders/Purchase Orders Worklist</>
(VL04). If you attempt to create a delivery in transaction VL01, the
system issues a warning, but allows the delivery to be created.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

This may be due to one of following reasons:
1. The order has not been completely confirmed.
2. The order has been completely confirmed but the availability check
in the delivery confirms only partial availability.
3. The data in the order triggers a delivery split that would
distribute the order items among multiple deliveries. (e.g. different
ship-to parties at item level, different routes, etc.)

How to fix this error?

Check the order data. If collective processing has not been created in
the delivery, you can do it manually with transaction VL01, though it
will be incomplete.

Error message extract from SAP system. Copyright SAP SE.