How To Fix /BOBF/TOOLS_CC027 - Assoc. has cardinality 1:1 but sourcekey (&1) is not in ET_KEY_LINK

SAP Error Message - Details

• Message type: E = Error

• Message class: /BOBF/TOOLS_CC -

• Message number: 027

• Message text: Assoc. has cardinality 1:1 but sourcekey (&1) is not in ET_KEY_LINK

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /BOBF/TOOLS_CC027 - Assoc. has cardinality 1:1 but sourcekey (&1) is not in ET_KEY_LINK ?

  The SAP error message /BOBF/TOOLS_CC027 indicates a problem related to the cardinality of associations in the Business Object Processing Framework (BOPF). Specifically, it suggests that there is an association defined with a cardinality of 1:1, but the source key for that association is not found in the ET_KEY_LINK table. 
  Cause:
  
  
  Cardinality Mismatch: The association is defined as 1:1, meaning that for each instance of the source object, there should be exactly one corresponding instance of the target object. If the source key is not found in ET_KEY_LINK, it indicates that there is no corresponding entry in the target object for the given source object.
  
  
  Data Integrity Issues: There may be data integrity issues where the expected relationship between the source and target objects is not maintained. This could be due to missing data, incorrect data entries, or issues during data migration.
  
  
  Configuration Errors: There might be a misconfiguration in the BOPF model where the associations are not correctly defined or implemented.
  
  
  Solution:
  
  
  Check Data Consistency: Verify the data in both the source and target objects. Ensure that for every entry in the source object, there is a corresponding entry in the target object.
  
  
  Review BOPF Configuration: Check the BOPF configuration for the associations. Ensure that the cardinality is correctly defined and that the associations are properly set up.
  
  
  Debugging: Use debugging tools to trace the execution and identify where the mismatch occurs. This can help in understanding why the source key is not found in ET_KEY_LINK.
  
  
  Data Correction: If there are missing entries in the target object, you may need to create or correct those entries to ensure that the 1:1 relationship is maintained.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to BOPF and the specific error message for additional insights or updates that may address the issue.
  
  
  Related Information:
  
  BOPF (Business Object Processing Framework): A framework in SAP that allows for the creation and management of business objects and their relationships.
  Cardinality: Refers to the number of instances of one entity that can or must be associated with each instance of another entity. In this case, 1:1 means one instance of the source can relate to only one instance of the target.
  ET_KEY_LINK: This is a table that holds the key links between the source and target objects in the BOPF framework.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.