How To Fix UGMD7101 - Assign DataSource field &1 once only

SAP Error Message - Details

• Message type: E = Error

• Message class: UGMD7 - Messages for Package UGMD7

• Message number: 101

• Message text: Assign DataSource field &1 once only

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UGMD7101 - Assign DataSource field &1 once only ?

  The SAP error message UGMD7101, which states "Assign DataSource field &1 once only," typically occurs in the context of data modeling or data extraction processes in SAP BW (Business Warehouse) or SAP HANA. This error indicates that a particular field in a DataSource has been assigned multiple times, which is not allowed.
  Cause:
  The error is caused by the following scenarios:
  
  Duplicate Assignments: The same field is assigned to multiple targets or mappings within the DataSource.
  Incorrect Configuration: There may be a misconfiguration in the DataSource setup, where the same field is inadvertently mapped to different characteristics or key figures.
  DataSource Definition Issues: The DataSource definition may have been altered or incorrectly set up, leading to conflicts in field assignments.
  
  Solution:
  To resolve the UGMD7101 error, you can follow these steps:
  
  
  Check Field Assignments:
  
  Go to the DataSource in the SAP BW or HANA modeling environment.
  Review the field assignments and ensure that each field is assigned only once. Look for any duplicate mappings.
  
  
  
  Remove Duplicates:
  
  If you find that a field is assigned multiple times, remove the duplicate assignments. Ensure that each field is uniquely mapped to its target.
  
  
  
  Validate DataSource:
  
  After making changes, validate the DataSource to ensure that there are no further issues. This can often be done through the DataSource maintenance transaction (e.g., RSA1 for BW).
  
  
  
  Transport Changes:
  
  If you are working in a development environment, ensure that any changes are transported to the appropriate environments (e.g., quality, production) after thorough testing.
  
  
  
  Check Documentation:
  
  Review any documentation or guidelines related to the DataSource configuration to ensure compliance with best practices.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  
  
  Related Information:
  
  Transaction Codes: Common transaction codes related to DataSource management include RSA1 (Data Warehousing Workbench), RSO2 (Maintain DataSource), and RSO3 (Display DataSource).
  SAP BW Documentation: Refer to SAP BW documentation for best practices on DataSource configuration and field mapping.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the UGMD7101 error and ensure that your DataSource is correctly configured.