How To Fix 06577 - Not possible to assign a source to all items

06577 - Overview

• Message type: E = Error

• Message class: 06 -

• Message number: 577

• Message text: Not possible to assign a source to all items

What causes this issue?

The system was not able to determine a <GL><GL:source_of_supply>source
of supply</> for all items.

How to fix this error?

When creating a requisition:
You can save the PO as usual - the purchase requisition will be
processed by purchasing without assignment. You can also enter a source
manually in the item detail data (under "sources of supply").
When creating a PO with " supplier unknown":
If you cannot currently assign a source to the items, you have the
option of storing the items as a purchase requisition (via F13).

Error message extract from SAP system. Copyright SAP SE.

06577 - Details

• The SAP error message "06577 Not possible to assign a source to all items" typically occurs during the procurement process, particularly when trying to assign a source of supply to a purchase requisition or purchase order. This error indicates that not all items in the requisition or order can be assigned a source, which can be due to various reasons.
  Causes:
  
  Missing Source of Supply: There may not be a valid source of supply (vendor or contract) available for one or more items in the requisition or order.
  Inconsistent Data: The data for the items may be inconsistent, such as incorrect material master data or vendor information.
  Item Category Issues: Certain item categories may not allow for source assignment.
  Incomplete Info Records: The info records for the materials may be incomplete or missing.
  Blocked Vendors: The vendor assigned to the item may be blocked or inactive.
  Plant-Specific Issues: The source of supply may not be valid for