How To Fix UR426 - The transaction data delta is being reversed and must be replicated again

SAP Error Message - Details

• Message type: E = Error

• Message class: UR -

• Message number: 426

• Message text: The transaction data delta is being reversed and must be replicated again

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UR426 - The transaction data delta is being reversed and must be replicated again ?

  The SAP error message UR426 indicates that there is an issue with the delta replication of transaction data in the SAP system. This typically occurs in scenarios involving data replication, such as when using SAP Data Services, SAP Landscape Transformation (SLT), or other data replication tools. The error suggests that the delta data that was previously sent has been reversed, and therefore, it needs to be replicated again to ensure data consistency.
  Cause:
  
  Data Inconsistency: The delta records may have been altered or deleted in the source system after they were initially replicated, leading to inconsistencies.
  Replication Errors: There may have been errors during the initial replication process that caused the delta records to be incomplete or incorrect.
  Configuration Issues: Incorrect configuration settings in the replication setup can lead to issues with delta handling.
  Data Model Changes: Changes in the data model or structure in the source system can affect how delta data is processed and replicated.
  
  Solution:
  
  
  Reinitialize Delta Replication:
  
  You may need to reinitialize the delta replication process. This involves resetting the delta queue and starting the replication from scratch.
  In SLT, you can do this by stopping the replication, deleting the delta queue, and then reconfiguring the replication.
  
  
  
  Check for Errors:
  
  Review the logs and error messages in the SAP system to identify any specific issues that may have caused the delta to be reversed.
  Use transaction codes like SLG1 (Application Log) to check for detailed logs related to the replication process.
  
  
  
  Data Consistency Check:
  
  Ensure that the data in the source system is consistent and that there are no missing or corrupted records.
  Perform a consistency check between the source and target systems to identify discrepancies.
  
  
  
  Configuration Review:
  
  Review the configuration settings for the replication process to ensure they are set up correctly.
  Check for any recent changes in the data model or replication settings that may have affected the delta replication.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific replication tool you are using (e.g., SLT, Data Services) for additional troubleshooting steps and best practices.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed logs and error messages to help diagnose the problem.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLT (for Landscape Transformation) or other tools you are using for data replication.
  SAP Notes: Search for SAP Notes related to UR426 or delta replication issues for any known issues and fixes.
  Best Practices: Follow best practices for data replication, including regular monitoring of replication processes and maintaining data consistency between source and target systems.
  
  By addressing the underlying causes and following the suggested solutions, you should be able to resolve the UR426 error and ensure successful delta replication in your SAP environment.