How To Fix LTR2_CHANGELOG121 - Target field length changed

SAP Error Message - Details

• Message type: E = Error

• Message class: LTR2_CHANGELOG -

• Message number: 121

• Message text: Target field length changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LTR2_CHANGELOG121 - Target field length changed ?

  The SAP error message LTR2_CHANGELOG121 indicates that there is a mismatch in the target field length during a data transfer or data replication process, particularly when using the SAP Landscape Transformation (SLT) Replication Server. This error typically occurs when the length of a field in the source table does not match the length of the corresponding field in the target table.
  Cause:
  
  Field Length Mismatch: The most common cause is that the field length in the source table has been changed (increased or decreased) after the initial configuration of the SLT replication.
  Data Type Changes: Changes in the data type of the field (e.g., from CHAR to VARCHAR) can also lead to this error.
  Schema Changes: Any changes made to the database schema that affect the field definitions can trigger this error.
  
  Solution:
  To resolve the LTR2_CHANGELOG121 error, you can follow these steps:
  
  
  Check Field Definitions:
  
  Compare the field definitions (length and data type) of the source and target tables. Ensure that they match.
  
  
  
  Adjust Target Table:
  
  If the source field length has been increased, you may need to adjust the target table's field length accordingly.
  If the source field length has been decreased, you may need to truncate the data in the target table or adjust the field length.
  
  
  
  Reconfigure SLT:
  
  If changes have been made to the source table, you may need to reconfigure the SLT settings. This can involve stopping the replication, making the necessary adjustments, and then restarting the replication.
  
  
  
  Data Consistency:
  
  Ensure that the data in the target table is consistent with the new field definitions. You may need to clean up or transform the data if necessary.
  
  
  
  Check SLT Logs:
  
  Review the SLT logs for additional details about the error. This can provide insights into which specific field is causing the issue.
  
  
  
  Test Replication:
  
  After making the necessary adjustments, test the replication process to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  SLT Documentation: Refer to the official SAP documentation for SLT for best practices on managing field definitions and replication settings.
  Data Dictionary: Use transaction codes like SE11 or SE12 to view and compare the data dictionary definitions of the source and target tables.
  
  By following these steps, you should be able to resolve the LTR2_CHANGELOG121 error and ensure successful data replication between your source and target systems.