How To Fix ME291 - Please do not maintain line structure for a scope of list with dynpro

SAP Error Message - Details

• Message type: E = Error

• Message class: ME - Purchasing: General Messages

• Message number: 291

• Message text: Please do not maintain line structure for a scope of list with dynpro

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ME291 - Please do not maintain line structure for a scope of list with dynpro ?

  The SAP error message ME291, which states "Please do not maintain line structure for a scope of list with dynpro," typically occurs in the context of maintaining purchasing documents or when working with certain transaction codes related to purchasing in SAP.
  Cause:
  This error usually arises when there is an attempt to maintain or modify a line item structure in a context where it is not allowed. Specifically, it can occur when:
  
  Line Structure Misconfiguration: The system is configured to expect a certain structure for the data being processed, and the user is trying to change or maintain line items in a way that conflicts with this configuration.
  Dynpro (Dynamic Programming) Context: The error indicates that the operation being performed is not compatible with the dynamic screen (dynpro) context, which is often used for displaying or processing lists in SAP.
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check Configuration: Review the configuration settings for the purchasing documents or the specific transaction you are working with. Ensure that the line item structure is correctly defined and that you are not trying to modify it in a way that is not permitted.
  
  
  Use Appropriate Transaction: Make sure you are using the correct transaction code for the operation you are trying to perform. If you are trying to maintain line items, ensure that you are in the right mode (e.g., display vs. change).
  
  
  Avoid Line Structure Maintenance: If the error message explicitly states not to maintain line structure, refrain from trying to edit or maintain line items in that context. Instead, focus on the overall document or header information.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction or module you are working with. There may be specific guidelines or restrictions related to line item maintenance.
  
  
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support or your internal SAP team for further assistance. They may have additional insights or solutions based on your specific system configuration.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with the relevant transaction codes related to purchasing, such as ME21N (Create Purchase Order), ME22N (Change Purchase Order), and ME23N (Display Purchase Order).
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide patches or updates that address the issue.
  User Roles and Authorizations: Ensure that your user role has the necessary authorizations to perform the actions you are attempting. Lack of proper authorizations can sometimes lead to unexpected error messages.
  
  By following these steps, you should be able to address the ME291 error effectively.