How To Fix IUUC_MAIN063 - Key field difference detected for table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 063

• Message text: Key field difference detected for table &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN063 - Key field difference detected for table &1 ?

  The SAP error message IUUC_MAIN063 indicates that there is a key field difference detected for a specific table during the initial load or delta replication process in the SAP Landscape Transformation (SLT) replication setup. This error typically arises when there is a mismatch in the key fields of the source and target tables, which can prevent successful data replication.
  Cause:
  
  Key Field Mismatch: The key fields in the source table do not match the key fields defined in the target table. This can happen if the structure of the source table has changed (e.g., fields added, removed, or modified) after the initial configuration.
  Data Inconsistency: There may be inconsistencies in the data between the source and target systems, such as missing or duplicate key values.
  Configuration Issues: The SLT configuration may not be set up correctly, leading to discrepancies in how key fields are defined or mapped.
  
  Solution:
  
  Check Table Structure: Verify the structure of the source and target tables to ensure that the key fields are defined consistently. You can do this by comparing the data dictionary definitions (transaction SE11) of both tables.
  Adjust SLT Configuration: If there have been changes to the source table, you may need to adjust the SLT configuration to reflect these changes. This may involve reconfiguring the replication settings or reinitializing the data load.
  Data Consistency Check: Perform a data consistency check to identify any discrepancies in the key fields. This may involve running SQL queries to compare the key values in both systems.
  Reinitialize Replication: If the issue persists, consider reinitializing the replication for the affected table. This involves stopping the replication, clearing the existing data in the target table, and then starting a new initial load.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on resolving key field differences.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SLT (for Landscape Transformation) to access the replication settings and monitor the status of the data replication.
  SAP Documentation: Refer to the official SAP documentation for SLT for detailed information on configuring and troubleshooting replication issues.
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the IUUC_MAIN063 error effectively.