How To Fix UR145 - Delta update no longer possible due to realignment

SAP Error Message - Details

• Message type: E = Error

• Message class: UR -

• Message number: 145

• Message text: Delta update no longer possible due to realignment

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UR145 - Delta update no longer possible due to realignment ?

  The SAP error message UR145 indicates that a delta update is no longer possible due to realignment. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA environments where data is being transferred from a source system to a target system, and there are issues with the delta mechanism.
  Cause:
  
  
  Realignment of Data: The error usually arises when there has been a change in the data structure or the data itself in the source system. This can happen due to:
  
  Changes in the underlying data model (e.g., changes in the InfoObject or DataSource).
  Deletion or modification of records in the source system that affect the delta mechanism.
  A long period of inactivity in delta updates, leading to the delta queue being reset or cleared.
  
  
  
  Delta Queue Issues: If the delta queue has not been processed for a long time, it may become inconsistent, leading to this error.
  
  
  Data Consistency: If the data in the source system has been modified in a way that is incompatible with the delta logic, it can cause this error.
  
  
  Solution:
  
  
  Full Load: The most common solution is to perform a full data load from the source system to the target system. This will reset the delta mechanism and allow for new delta updates to be processed correctly.
  
  In SAP BW, you can do this by executing a full load for the relevant DataSource or InfoProvider.
  
  
  
  Check Delta Queue: Investigate the delta queue for any inconsistencies or errors. You can use transaction codes like RSA7 to monitor the delta queue and check for any issues.
  
  
  Reinitialize Delta: If a full load is not feasible, you can try to reinitialize the delta for the specific DataSource. This involves:
  
  Deleting the existing delta initialization.
  Reinitializing the delta process to capture the current state of the data.
  
  
  
  Data Consistency Checks: Ensure that the data in the source system is consistent and that there are no changes that would affect the delta logic. This may involve checking for deleted or modified records.
  
  
  Consult Documentation: Refer to SAP Notes and documentation related to delta updates and realignment issues for specific guidance and troubleshooting steps.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSA7 (Delta Queue Monitor), and RSCUSTV10 (Delta Settings).
  SAP Notes: Check for specific SAP Notes related to UR145 and delta updates, as they may provide additional insights or patches.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the UR145 error and restore the delta update functionality in your SAP environment.