How To Fix M8688 - Creation of several supplier line items is not possible for doc. type &

SAP Error Message - Details

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 688

• Message text: Creation of several supplier line items is not possible for doc. type &

What causes this issue?

The document type entered results in a net posting. Further processing
of several supplier line items within a single invoice document is not
supported for this type of posting.

System Response

The document cannot be processed further.

How to fix this error?

If you are in create or change mode:
Either use a document type which results in a gross posting or create
only one supplier line item within this document.

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

If you are in display mode:
On the basis of the document type selected, this document does not
contain any splitting information, so displaying it is not possible.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8688 - Creation of several supplier line items is not possible for doc. type & ?

  The SAP error message M8688, which states "Creation of several supplier line items is not possible for doc. type &," typically occurs when there is an attempt to create multiple line items for a supplier invoice or document type that does not support this functionality. This can happen in various scenarios, such as when trying to post a document that is not configured to allow multiple line items for a specific document type.
  Causes:
  
  Document Type Configuration: The document type being used may not be configured to allow multiple line items for supplier invoices. This is often a configuration issue in the SAP system.
  Transaction Type Restrictions: Certain transaction types may have restrictions on the number of line items that can be created.
  Incorrect Posting Logic: The logic used in the transaction may not align with the expected behavior for the document type.
  User Authorization: The user may not have the necessary authorizations to create multiple line items for the specified document type.
  
  Solutions:
  
  
  Check Document Type Configuration:
  
  Go to the configuration settings for the document type in the SAP system (Transaction Code: OBA7 or SPRO).
  Ensure that the document type is set up to allow multiple line items. This may involve checking the settings for the relevant purchasing or accounting document types.
  
  
  
  Review Transaction Type:
  
  Verify if the transaction type being used supports multiple line items. If not, consider using a different transaction type that does.
  
  
  
  Adjust Posting Logic:
  
  If you are using custom logic or a custom program to create the document, review the code to ensure it adheres to the expected behavior for the document type.
  
  
  
  User Authorization:
  
  Check the user roles and authorizations to ensure that the user has the necessary permissions to create multiple line items for the document type in question.
  
  
  
  Consult SAP Documentation:
  
  Refer to SAP documentation or help resources for specific details on the document type and its capabilities.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME21N (Create Purchase Order), MIRO (Enter Incoming Invoice), and OBA7 (Document Type Configuration).
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.