How To Fix SLS302 - An internal error occured in a tree control class.

SAP Error Message - Details

• Message type: E = Error

• Message class: SLS - PAW - Message class

• Message number: 302

• Message text: An internal error occured in a tree control class.

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SLS302 - An internal error occured in a tree control class. ?

  The SAP error message SLS302, which states "An internal error occurred in a tree control class," typically indicates that there is an issue with the tree control component in the SAP GUI or the underlying application. This error can arise due to various reasons, including:
  Causes:
  
  Corrupted SAP GUI Installation: The SAP GUI installation may be corrupted or not properly configured.
  Incompatible SAP GUI Version: The version of the SAP GUI may not be compatible with the SAP system you are trying to access.
  Data Issues: There may be issues with the data being processed, such as missing or corrupted entries.
  Memory Issues: Insufficient memory or resources on the client machine can lead to this error.
  Custom Code or Add-ons: Custom developments or third-party add-ons may interfere with the standard functionality of the tree control.
  
  Solutions:
  
  Restart SAP GUI: Sometimes, simply restarting the SAP GUI can resolve temporary glitches.
  Check for Updates: Ensure that you are using the latest version of the SAP GUI. If not, update to the latest version.
  Reinstall SAP GUI: If the installation is suspected to be corrupted, uninstall and then reinstall the SAP GUI.
  Clear Cache: Clear the SAP GUI cache. This can sometimes resolve issues related to corrupted temporary files.
  Check User Authorizations: Ensure that the user has the necessary authorizations to access the data or transaction that is causing the error.
  Review Custom Code: If there are any custom developments or add-ons, review them for potential issues or conflicts with the standard SAP functionality.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for further assistance. Provide them with detailed information about the error, including the steps to reproduce it.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. SAP Notes often contain patches or workarounds for known issues.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  Transaction Codes: If the error occurs in a specific transaction, try to identify if the issue is isolated to that transaction or if it occurs across multiple transactions.
  
  By following these steps, you should be able to diagnose and potentially resolve the SLS302 error in SAP.