How To Fix RSAN_RT750 - Error: Key value &1 occurs more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAN_RT - Messages for Runtime Analysis

• Message number: 750

• Message text: Error: Key value &1 occurs more than once

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSAN_RT750 - Error: Key value &1 occurs more than once ?

  The SAP error message RSAN_RT750, which states "Key value &1 occurs more than once," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there is a problem with data consistency in the InfoProvider or during data extraction and loading processes. This error indicates that a key value that is expected to be unique is found multiple times in the dataset being processed.
  Cause:
  
  Duplicate Key Values: The most common cause of this error is that the key value (e.g., a combination of characteristics or fields that should be unique) is duplicated in the data being processed. This can happen during data loading from source systems or when aggregating data.
  Incorrect Data Modeling: The data model may not be set up correctly, leading to situations where the same key value can appear multiple times.
  Data Quality Issues: There may be underlying data quality issues in the source system that lead to duplicates being extracted.
  
  Solution:
  
  
  Identify Duplicates: 
  
  Use transaction codes like SE16 or SE11 to check the relevant tables for duplicates. You can run SQL queries to find duplicate key values in the relevant InfoProvider or data source.
  For example, you can use a query like:
  SELECT key_field, COUNT(*)
  FROM your_table
  GROUP BY key_field
  HAVING COUNT(*) > 1;
  
  
  
  
  Data Cleansing: 
  
  Once duplicates are identified, you need to cleanse the data. This may involve removing duplicates, correcting data entries, or adjusting the data model to ensure uniqueness.
  If the duplicates are valid and should coexist, consider adjusting the data model to accommodate them (e.g., by adding additional characteristics to create a composite key).
  
  
  
  Adjust Data Load Process: 
  
  Review the data extraction and loading process to ensure that it is correctly configured to handle duplicates. This may involve modifying the transformation rules or the data flow logic.
  
  
  
  Check Data Model: 
  
  Review the InfoObjects and InfoProviders to ensure that they are correctly defined and that the key fields are set up to enforce uniqueness.
  
  
  
  Testing: 
  
  After making changes, perform a test load to ensure that the error is resolved and that the data integrity is maintained.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RSAN_RT750 for any specific patches or updates that may address this issue.
  Documentation: Review SAP BW documentation for best practices on data modeling and handling duplicates.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the RSAN_RT750 error and ensure that your data processing in SAP BW or HANA runs smoothly.