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