How To Fix KN127 - Maximum number of selection screens reached

SAP Error Message - Details

• Message type: E = Error

• Message class: KN - Reporting for Costing

• Message number: 127

• Message text: Maximum number of selection screens reached

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KN127 - Maximum number of selection screens reached ?

  The SAP error message KN127 "Maximum number of selection screens reached" typically occurs when a user tries to execute a transaction or report that exceeds the allowed number of selection screens in a single session. This can happen in various scenarios, particularly when dealing with complex reports or when multiple selection screens are opened in succession.
  Cause:
  
  Exceeding Limits: SAP has a limit on the number of selection screens that can be opened in a single session. If a user opens too many selection screens, this error will be triggered.
  Complex Reports: Some reports may have multiple selection screens that are called one after another, leading to the accumulation of open screens.
  User Behavior: Users may inadvertently open multiple instances of the same report or transaction, contributing to the limit being reached.
  
  Solution:
  
  Close Unused Selection Screens: The simplest solution is to close any selection screens that are not currently in use. This can be done by navigating back or using the "Back" button in the SAP GUI.
  Limit Report Execution: If you are running reports that require multiple selection screens, try to limit the number of times you execute them in a single session.
  Use Variants: If applicable, use variants to predefine selection criteria, which can reduce the need for multiple selection screens.
  Session Management: Consider managing your sessions more effectively. If you need to run multiple reports, you can log into a new session (using Ctrl + N) to avoid hitting the limit in the current session.
  Check for Custom Code: If the error occurs in a custom report or transaction, review the code to see if it can be optimized to reduce the number of selection screens.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. Sometimes, SAP releases notes that address specific issues or provide guidance on handling such errors.
  Transaction Codes: Familiarize yourself with transaction codes that may help in managing sessions or reports, such as SE38 for executing reports or SE80 for development work.
  User Training: Providing training to users on how to manage their sessions and selection screens can help prevent this error from occurring frequently.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.