How To Fix SE691 - Combination of these line categories not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: SE - Dienstleistungen Stammdaten Leistungsposition

• Message number: 691

• Message text: Combination of these line categories not allowed

What causes this issue?

The combination of contingency lines with alternaltive lines is not
allowed for a service.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SE691 - Combination of these line categories not allowed ?

  The SAP error message SE691, which states "Combination of these line categories not allowed," typically occurs in the context of financial documents, particularly when dealing with line items in a document that are not compatible with each other based on the configuration settings in the system.
  Cause:
  This error usually arises due to one or more of the following reasons:
  
  
  Line Category Configuration: The line items in the document may belong to different categories that are not allowed to be combined. For example, you might be trying to mix revenue and expense line items in a way that is not permitted by the system configuration.
  
  
  Document Type Restrictions: Certain document types may have restrictions on the types of line items that can be included. For instance, a specific document type may only allow certain categories of line items.
  
  
  Account Assignment Issues: If the line items are assigned to different account assignment categories (like cost centers, internal orders, etc.), this can lead to incompatibility.
  
  
  Custom Validation Rules: Custom validations or enhancements in the SAP system may impose additional restrictions on the combinations of line items.
  
  
  Solution:
  To resolve the SE691 error, you can take the following steps:
  
  
  Review Line Items: Check the line items in the document to ensure they belong to compatible categories. Make sure that you are not mixing incompatible line types.
  
  
  Check Document Type Settings: Review the configuration of the document type you are using. Ensure that it allows the combination of the line categories you are trying to use.
  
  
  Consult Configuration: If you have access to the configuration settings (transaction code SPRO), navigate to the relevant section for financial accounting and check the settings for line categories and document types.
  
  
  Account Assignment Review: Ensure that all line items have compatible account assignments. If they are assigned to different cost centers or internal orders, consider consolidating them under a single assignment.
  
  
  Consult with SAP Support or Functional Consultant: If you are unable to identify the issue, it may be helpful to consult with your SAP support team or a functional consultant who can provide insights based on the specific configuration of your SAP system.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like FB50 (for general ledger postings) or FB60 (for vendor invoices) to test the line item combinations.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Review SAP documentation related to financial accounting and document processing for more insights on line categories and their configurations.
  
  By following these steps, you should be able to identify the cause of the SE691 error and implement a solution to resolve it.