How To Fix RSBC401 - Incompatible combination of sources regarding delta process for &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RSBC - Messages for DTP Command and Command Templates

• Message number: 401

• Message text: Incompatible combination of sources regarding delta process for &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSBC401 - Incompatible combination of sources regarding delta process for &1 ?

  The SAP error message RSBC401, which states "Incompatible combination of sources regarding delta process for &1," typically occurs in the context of data extraction from a source system to a data warehouse, particularly when dealing with delta loads in SAP BW (Business Warehouse).
  Cause:
  The error usually arises due to one of the following reasons:
  
  
  Incompatible Data Sources: The delta process is trying to extract data from multiple sources that are not compatible with each other. This can happen if the data sources have different structures, data types, or if they are not set up to work together in the delta process.
  
  
  Incorrect Delta Configuration: The delta configuration for the data source may not be set up correctly. This includes issues with the delta queue or the way the delta process is defined in the source system.
  
  
  Changes in Source Structure: If there have been changes in the structure of the source data (like adding or removing fields), it can lead to incompatibility issues.
  
  
  Data Source Activation: The data source may not be activated properly in the BW system, or there may be issues with the extraction setup.
  
  
  Solution:
  To resolve the RSBC401 error, you can take the following steps:
  
  
  Check Data Source Compatibility: Ensure that the data sources you are trying to use for the delta process are compatible. Review the structure and data types of the sources.
  
  
  Review Delta Configuration: Go to the data source settings in the SAP BW system and verify that the delta configuration is set up correctly. Make sure that the delta process is properly defined.
  
  
  Re-activate Data Source: If there have been changes to the data source, try reactivating it in the BW system. This can often resolve issues related to changes in the source structure.
  
  
  Check for Source System Changes: Investigate if there have been any recent changes in the source system that could affect the delta extraction. If changes were made, you may need to adjust the BW data source accordingly.
  
  
  Monitor Delta Queue: Check the delta queue in the source system for any errors or inconsistencies. You can use transaction codes like RSA7 to monitor the delta queue.
  
  
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  
  
  Test Extraction: After making the necessary adjustments, perform a test extraction to ensure that the delta process works as expected.
  
  
  Related Information:
  
  Transaction Codes: You may find it useful to use transaction codes such as RSA1 (Data Warehousing Workbench), RSA7 (Delta Queue Monitor), and RSO2 (Data Source Maintenance) to troubleshoot and manage data sources.
  SAP Documentation: Refer to the official SAP documentation for detailed guidance on setting up and managing delta processes in BW.
  SAP Community: Engaging with the SAP Community can provide insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the RSBC401 error in your SAP BW environment.