How To Fix MC841 - Buffering is not possible for views with session variables

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 841

• Message text: Buffering is not possible for views with session variables

What causes this issue?

This view uses session variables either directly or in the queue of its
Basis objects, and is to be buffered at the same time.

System Response

The activation will be rejected or the view buffering will not be
successful.

How to fix this error?

If the view has to work with session variables, you will need to undo
the buffering. If the view has to be buffered, it cannot, conversely,
contain any session variables.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC841 - Buffering is not possible for views with session variables ?

  The SAP error message MC841: Buffering is not possible for views with session variables typically occurs when you are trying to buffer a database view that contains session variables. In SAP, buffering is a performance optimization technique that allows frequently accessed data to be stored in memory, reducing the need for repeated database access. However, when session variables are involved, buffering cannot be applied because session variables can change during a user's session, leading to inconsistent data being served from the buffer.
  Cause
  The primary cause of this error is the presence of session variables in the database view that you are trying to buffer. Session variables are dynamic and can vary from one user session to another, which makes it impossible to cache the results reliably.
  Solution
  To resolve this error, you can consider the following approaches:
  
  
  Remove Session Variables: If possible, modify the database view to eliminate session variables. This may involve redesigning the view or using alternative methods to achieve the desired functionality without session variables.
  
  
  Use Alternative Views: If the view is essential and cannot be modified, consider creating a different view that does not include session variables and can be buffered.
  
  
  Adjust Buffering Settings: If the view is not critical for performance, you can choose to disable buffering for that specific view. This can be done in the Data Dictionary (SE11) by adjusting the buffering settings.
  
  
  Use Application Logic: Instead of relying on database views with session variables, consider handling the logic in the application layer. This may involve fetching data based on session variables in the application code rather than in the database view.
  
  
  Consult Documentation: Review SAP documentation or consult with your SAP Basis or ABAP team for best practices regarding buffering and session variables.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. Sometimes, SAP provides fixes or workarounds for known issues.
  Performance Considerations: Understand the implications of removing buffering on performance. If the view is accessed frequently, consider the impact on database load and response times.
  Testing: After making changes, thoroughly test the application to ensure that the removal of session variables or changes to buffering settings do not introduce new issues.
  
  By following these steps, you should be able to address the MC841 error and optimize your SAP environment effectively.