How To Fix ME579 - Some of the requisitions cannot be converted into purchase orders

SAP Error Message - Details

• Message type: E = Error

• Message class: ME - Purchasing: General Messages

• Message number: 579

• Message text: Some of the requisitions cannot be converted into purchase orders

What causes this issue?

The requisition was generated from a Sales and Distribution document.
It can only be converted into a single purchase order item. It is not
possible to reference it in more than one PO item.
However, since the quantity covered by this requisition has already
been ordered in part, no new PO item can be generated.

System Response

This requisition will not be taken into account when you generate the
purchase order.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ME579 - Some of the requisitions cannot be converted into purchase orders ?

  The SAP error message ME579 indicates that some requisitions cannot be converted into purchase orders. This error can occur for various reasons, and understanding the cause is essential for resolving the issue. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Incomplete or Incorrect Data: The requisition may have missing or incorrect information, such as vendor details, material numbers, or quantities.
  Blocked Requisitions: The requisition might be blocked for purchasing due to various reasons, such as budget constraints or approval workflows.
  Invalid Vendor: The vendor associated with the requisition may not be valid or may not be set up for the purchasing organization.
  Material Master Issues: The material may not be set up correctly in the material master, or it may be marked as inactive.
  Purchase Order Limits: There may be limits set on the purchase order that prevent the requisition from being converted.
  Account Assignment Issues: The account assignment in the requisition may not be valid or may not correspond to the purchasing organization.
  Document Type Restrictions: The document type used for the requisition may not be allowed for conversion to a purchase order.
  
  Solutions:
  
  Check Requisition Details: Review the requisition for any missing or incorrect information. Ensure that all required fields are filled out correctly.
  Review Blocked Status: Check if the requisition is blocked for purchasing. If it is, resolve the underlying issue that caused the block.
  Validate Vendor Information: Ensure that the vendor is valid and active in the system. Check if the vendor is assigned to the correct purchasing organization.
  Material Master Verification: Verify that the material is correctly set up in the material master and is active for the relevant purchasing organization.
  Review Purchase Order Limits: Check if there are any limits set on the purchase order that may be preventing the conversion.
  Account Assignment Check: Ensure that the account assignment in the requisition is valid and corresponds to the purchasing organization.
  Document Type Configuration: Verify that the document type used for the requisition is allowed for conversion to a purchase order.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like ME53N (Display Purchase Requisition) to view the requisition details and identify issues.
  SAP Notes: Check SAP Notes for any known issues or patches related to the ME579 error.
  User Authorizations: Ensure that the user attempting to convert the requisition has the necessary authorizations to perform the action.
  Consult Documentation: Refer to SAP documentation or help files for more detailed information on purchase requisitions and purchase orders.
  
  By systematically checking these areas, you should be able to identify the cause of the ME579 error and take appropriate action to resolve it.