How To Fix MSG_UH166 - Failed to update &1 hierarchies.

SAP Error Message - Details

• Message type: E = Error

• Message class: MSG_UH - Universal Hierarchy Message Class

• Message number: 166

• Message text: Failed to update &1 hierarchies.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MSG_UH166 - Failed to update &1 hierarchies. ?

  The SAP error message MSG_UH166: "Failed to update &1 hierarchies." typically occurs in the context of updating or maintaining hierarchies in SAP systems, particularly in the areas of SAP BW (Business Warehouse) or SAP ERP where hierarchical data structures are used.
  Cause:
  The error can be caused by several factors, including:
  
  Data Inconsistencies: There may be inconsistencies in the data being processed, such as missing or incorrect entries in the hierarchy tables.
  Locking Issues: The hierarchy might be locked by another process or user, preventing updates.
  Authorization Issues: The user may not have the necessary authorizations to perform updates on the hierarchy.
  Technical Errors: There could be technical issues such as database connectivity problems or issues with the underlying data model.
  Incorrect Hierarchy Structure: The hierarchy structure being updated may not conform to the expected format or rules defined in the system.
  
  Solution:
  To resolve the MSG_UH166 error, you can take the following steps:
  
  
  Check Data Consistency:
  
  Verify the data being used for the hierarchy update. Ensure that all required fields are populated and that there are no inconsistencies.
  
  
  
  Release Locks:
  
  Check if the hierarchy is locked by another user or process. You can use transaction codes like SM12 to view and release locks if necessary.
  
  
  
  Review Authorizations:
  
  Ensure that the user performing the update has the necessary authorizations. You can check user roles and authorizations in transaction SU53 or SU01.
  
  
  
  Check for Technical Issues:
  
  Look into system logs (transaction SLG1) for any technical errors that might provide more context about the failure.
  Ensure that the database connection is stable and that there are no ongoing issues with the SAP system.
  
  
  
  Validate Hierarchy Structure:
  
  Review the hierarchy structure to ensure it adheres to the expected format. You may need to consult the documentation or configuration settings for the specific hierarchy type you are working with.
  
  
  
  Reprocess the Update:
  
  After addressing the above issues, attempt to reprocess the hierarchy update. If the error persists, consider using transaction codes like RSA1 (for BW) to check the data model and hierarchy settings.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), SM12 (Display and Delete Locks), and SLG1 (Application Log).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to hierarchy management in your specific module (e.g., BW, ERP) for best practices and guidelines.
  
  If the issue continues after following these steps, it may be beneficial to consult with your SAP Basis or technical support team for further assistance.