How To Fix RSM1120 - Change log requests from DSO &1 used for reconstruction

SAP Error Message - Details

• Message type: E = Error

• Message class: RSM1 - Messages for AWB, Scheduler and Monitor (new)

• Message number: 120

• Message text: Change log requests from DSO &1 used for reconstruction

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSM1120 - Change log requests from DSO &1 used for reconstruction ?

  The SAP error message RSM1120 indicates that change log requests from a DataStore Object (DSO) are being used for reconstruction. This typically occurs in the context of data extraction and loading processes in SAP BW (Business Warehouse) when there are issues with the data consistency or when the system is trying to reconstruct data from the change log.
  Cause:
  
  Data Inconsistency: The error may arise when there is a mismatch or inconsistency in the data stored in the DSO. This can happen if there are issues during data loading or if the data was not properly updated.
  Change Log Usage: The system is attempting to use the change log to reconstruct data because it cannot find the required data in the active table of the DSO. This can occur if the active data has been deleted or if the data is not available for some reason.
  Data Deletion: If records have been deleted from the DSO, the system may need to refer to the change log to retrieve the necessary information for reporting or further processing.
  
  Solution:
  
  Check Data Consistency: Verify the consistency of the data in the DSO. You can do this by checking the active data table and the change log table to ensure that they are in sync.
  Reprocess Data: If there are inconsistencies, you may need to reprocess the data load. This can involve reloading the data from the source system or performing a delta load to ensure that all changes are captured.
  Monitor Change Log: Ensure that the change log is being maintained properly. Check if the change log is being truncated or if there are any settings that might affect its retention.
  Data Repair: If necessary, you can use the DataStore Object repair tools available in SAP BW to fix any issues with the data.
  Consult SAP Notes: Look for relevant SAP Notes that may address specific issues related to this error message. SAP frequently updates its knowledge base with solutions for known issues.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSA1 (Data Warehousing Workbench) to monitor and manage your DSOs and data loads.
  Change Log Tables: Familiarize yourself with the structure of the change log tables (e.g., RSD1, RSD2) to understand how data is being tracked and managed.
  SAP BW Documentation: Refer to the official SAP BW documentation for best practices on managing DSOs and handling change logs.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage with SAP support or consult with a technical expert who specializes in SAP BW.