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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message 06577 - Not possible to assign a source to all items ?

  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 the specific plant or storage location.
  
  Solutions:
  
  Check Source of Supply: Verify that there is a valid source of supply for each item. This can be done by checking the vendor master data and info records.
  Review Material Master Data: Ensure that the material master data is complete and accurate, including purchasing views.
  Check Item Categories: Make sure that the item categories used in the requisition or order allow for source assignment.
  Update Info Records: If info records are missing or incomplete, create or update them to include the necessary details for the materials.
  Vendor Status: Check the status of the vendor. If the vendor is blocked, you may need to unblock it or select a different vendor.
  Plant and Storage Location: Ensure that the source of supply is valid for the specific plant and storage location associated with the items.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like ME51N (Create Purchase Requisition), ME21N (Create Purchase Order), ME11 (Create Info Record), and ME12 (Change Info Record) to manage procurement documents and info records.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  Debugging: If the issue persists, consider debugging the process to identify any underlying problems in the configuration or data.
  
  By following these steps, you should be able to resolve the error and successfully assign sources to all items in your procurement documents.