How To Fix SCWN055 - Deltas cannot be merged

SAP Error Message - Details

• Message type: E = Error

• Message class: SCWN - Messages Note installation and management

• Message number: 055

• Message text: Deltas cannot be merged

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SCWN055 - Deltas cannot be merged ?

  The SAP error message SCWN055, which states "Deltas cannot be merged," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there are issues with data delta processing. This error indicates that the system is unable to merge delta records due to inconsistencies or conflicts in the data.
  Causes:
  
  Inconsistent Delta Records: The delta records being processed may have inconsistencies, such as missing or incorrect keys, which prevent them from being merged.
  Data Model Changes: Changes in the data model (e.g., changes in InfoObjects, InfoProviders, or transformations) can lead to issues with delta processing.
  Data Load Issues: Problems during the data load process, such as failed loads or incomplete data, can result in delta records that cannot be merged.
  Locking Issues: If there are locks on the data being processed, it may prevent the merging of delta records.
  Incorrect Delta Management Settings: Misconfiguration in delta management settings can lead to issues with delta processing.
  
  Solutions:
  
  Check Delta Records: Review the delta records for inconsistencies. Ensure that all necessary keys and data are present and correct.
  Reprocess Delta Loads: If there are issues with specific delta loads, consider reprocessing them. This may involve deleting the problematic delta records and reloading the data.
  Review Data Model Changes: If there have been recent changes to the data model, ensure that all transformations and data flows are correctly configured to handle the new structure.
  Check for Locks: Investigate if there are any locks on the data being processed. You can use transaction codes like SM12 to check for locks and resolve them if necessary.
  Adjust Delta Management Settings: Review and adjust the delta management settings in the relevant InfoProviders or data sources to ensure they are correctly configured.
  Consult Logs: Check the relevant logs (e.g., SLG1 for application logs) for more detailed error messages that can provide insights into the specific cause of the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review SAP documentation related to delta processing in BW or HANA for best practices and configuration guidelines.
  
  If the issue persists after trying the above solutions, it may be beneficial to involve your SAP Basis or BW team for further investigation and support.