How To Fix RSAN_RT751 - Error: Predecessor &1 is invalid (see key value &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAN_RT - Messages for Runtime Analysis

• Message number: 751

• Message text: Error: Predecessor &1 is invalid (see key value &2)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSAN_RT751 - Error: Predecessor &1 is invalid (see key value &2) ?

  The SAP error message RSAN_RT751 indicates that there is an issue with a predecessor in a data flow or process chain. This error typically occurs in the context of SAP BW (Business Warehouse) or SAP BW/4HANA when a data flow is trying to reference a predecessor object (like an InfoPackage, DTP, or another process) that is either invalid or does not exist.
  Cause:
  
  Invalid Predecessor: The predecessor object referenced in the process chain or data flow is either deleted, inactive, or not properly defined.
  Incorrect Key Value: The key value associated with the predecessor might be incorrect or not matching the expected format.
  Transport Issues: If the process chain or data flow was transported from one system to another, the predecessor might not have been transported correctly or is missing in the target system.
  Configuration Issues: There may be configuration issues in the BW system that prevent the predecessor from being recognized.
  
  Solution:
  
  Check Predecessor Object: Verify that the predecessor object (e.g., InfoPackage, DTP, etc.) exists and is active. You can do this by navigating to the relevant transaction (like RSA1 for Data Warehousing Workbench) and checking the status of the predecessor.
  Correct Key Value: Ensure that the key value associated with the predecessor is correct. This may involve checking the naming conventions and ensuring that there are no typos or discrepancies.
  Recreate or Reactivate: If the predecessor object is missing or inactive, consider recreating it or reactivating it if it was previously deactivated.
  Check Transport Logs: If the issue arose after a transport, check the transport logs to ensure that all necessary objects were transported correctly.
  Review Process Chain: If the error occurs in a process chain, review the entire chain to ensure that all predecessors are correctly defined and linked.
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional troubleshooting steps or patches.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like RSA1 (Data Warehousing Workbench) or RSPC (Process Chain Maintenance) to investigate the issue.
  SAP Notes: Check SAP Notes for any known issues or fixes related to RSAN_RT751.
  System Logs: Review system logs for additional error messages or warnings that may provide more context about the issue.
  SAP Community: Engage with the SAP Community or forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the RSAN_RT751 error in your SAP BW environment.