How To Fix UJCTRL_EXCEPTION170 - Only one leaf member for dimension &1 is allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: UJCTRL_EXCEPTION - BPC: control exception message class

• Message number: 170

• Message text: Only one leaf member for dimension &1 is allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UJCTRL_EXCEPTION170 - Only one leaf member for dimension &1 is allowed ?

  The SAP error message UJCTRL_EXCEPTION170 indicates that there is an issue with the structure of a dimension in your SAP system, specifically in the context of SAP BW (Business Warehouse) or SAP BPC (Business Planning and Consolidation). The error message states that "Only one leaf member for dimension &1 is allowed," which means that the dimension in question has more than one leaf member defined, but the system expects only one.
  Cause:
  
  Dimension Structure: The dimension in question has been defined with multiple leaf members, which is not allowed in the context of the operation you are trying to perform.
  Data Model Configuration: There may be a misconfiguration in the data model or the hierarchy of the dimension.
  Data Loading Issues: If you are loading data into a cube or a planning model, the data might be structured incorrectly, leading to multiple leaf members being recognized.
  
  Solution:
  
  
  Check Dimension Definition:
  
  Go to the dimension in question and review its structure. Ensure that it only has one leaf member defined.
  If there are multiple leaf members, you may need to consolidate them or adjust the hierarchy to ensure that only one leaf member exists.
  
  
  
  Review Hierarchies:
  
  If the dimension uses hierarchies, check the hierarchy settings to ensure that they are correctly defined and that they do not allow multiple leaf members.
  
  
  
  Data Validation:
  
  Validate the data being loaded into the model. Ensure that the data conforms to the expected structure and that there are no duplicates or conflicts that could lead to multiple leaf members.
  
  
  
  Adjust Data Load Process:
  
  If the error occurs during a data load, review the data load process and mappings to ensure that they are correctly set up to avoid creating multiple leaf members.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on dimension management and data loading processes.
  
  
  
  Testing:
  
  After making changes, test the dimension and the data load process to ensure that the error is resolved.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered similar issues.
  Training and Documentation: Consider reviewing training materials or documentation related to SAP BW/BPC dimension management for best practices.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.