How To Fix /SAPAPO/MCPSH_SEL021 - Error generating a tree control

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/MCPSH_SEL -

• Message number: 021

• Message text: Error generating a tree control

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.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/MCPSH_SEL021 - Error generating a tree control ?

  The SAP error message /SAPAPO/MCPSH_SEL021 typically indicates an issue with generating a tree control in the SAP Advanced Planning and Optimization (APO) module. This error can arise due to various reasons, including data inconsistencies, configuration issues, or system performance problems.
  Causes:
  
  Data Inconsistencies: There may be missing or inconsistent data in the master data or transaction data that the tree control is trying to display.
  Configuration Issues: Incorrect settings in the APO configuration can lead to problems in generating the tree structure.
  Performance Issues: If the system is under heavy load or if there are performance bottlenecks, it may fail to generate the tree control.
  Authorization Issues: Lack of proper authorizations for the user trying to access the tree control can also lead to this error.
  Technical Issues: Bugs or issues in the SAP system or specific transactions can also cause this error.
  
  Solutions:
  
  
  Check Data Consistency:
  
  Verify that all necessary master data (like materials, locations, etc.) is correctly maintained and consistent.
  Use transaction codes like /SAPAPO/MD02 or /SAPAPO/MD04 to check for any inconsistencies.
  
  
  
  Review Configuration:
  
  Ensure that the configuration settings for the APO module are correctly set up. This includes checking the settings for the specific planning area or planning book you are using.
  Use transaction /SAPAPO/MC8C to check the configuration of the planning book.
  
  
  
  Monitor System Performance:
  
  Check system performance metrics to see if there are any bottlenecks. You can use transaction ST03N to analyze workload and performance.
  If the system is slow, consider optimizing the database or increasing system resources.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to access the data and generate the tree control. You can check this using transaction SU53 after the error occurs.
  
  
  
  Review SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be patches or updates available that resolve known issues.
  
  
  
  Debugging:
  
  If you have access to development tools, you can debug the transaction to identify the exact point of failure. This may require assistance from a technical consultant.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any relevant logs or screenshots.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in APO, such as /SAPAPO/MC8C for planning book configuration and /SAPAPO/MC9C for planning area configuration.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for APO to understand the expected behavior of tree controls and related functionalities.
  
  By following these steps, you should be able to diagnose and potentially resolve the error message /SAPAPO/MCPSH_SEL021.