How To Fix WRF_REF423 - No. of parall. tasks not successful on second try: &1! Serial processing!

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_REF - Messages from References for Materials Without History

• Message number: 423

• Message text: No. of parall. tasks not successful on second try: &1! Serial processing!

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_REF423 - No. of parall. tasks not successful on second try: &1! Serial processing! ?

  The SAP error message WRF_REF423 indicates that a parallel processing task has failed on its second attempt, and as a result, the system is reverting to serial processing. This error typically occurs in the context of SAP's Advanced Planning and Optimization (APO) or similar modules where parallel processing is utilized to improve performance.
  Cause:
  
  Resource Limitations: The system may not have enough resources (CPU, memory) to handle the parallel tasks effectively.
  Configuration Issues: There may be misconfigurations in the parallel processing settings or in the job definitions.
  Data Issues: The data being processed may have inconsistencies or errors that prevent successful execution.
  Locking Issues: There may be database locks or other processes that are preventing the parallel tasks from executing.
  System Errors: There could be underlying system errors or bugs that are causing the parallel tasks to fail.
  
  Solution:
  
  Check System Resources: Monitor the system's CPU and memory usage to ensure that there are enough resources available for parallel processing.
  Review Configuration: Verify the configuration settings for parallel processing in the relevant transaction codes (e.g., /SAPAPO/ transactions) and ensure they are set correctly.
  Analyze Logs: Check the application logs (transaction SLG1) for any detailed error messages that can provide more context on why the tasks failed.
  Data Validation: Ensure that the data being processed is valid and does not contain any inconsistencies or errors.
  Increase Parallel Processing Limits: If applicable, consider increasing the limits for parallel processing in the system settings.
  Check for Locks: Use transaction SM12 to check for any locks that might be affecting the processing and resolve them if necessary.
  Retry the Process: After addressing any identified issues, retry the process to see if it completes successfully.
  Consult SAP Notes: Look for any relevant SAP Notes that may address known issues related to this error message.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/ for APO-related tasks, SM37 for job monitoring, and SLG1 for log analysis.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages.
  Documentation: Review SAP documentation related to parallel processing and performance tuning for additional insights and best practices.
  
  By following these steps, you should be able to identify the root cause of the WRF_REF423 error and implement a solution to resolve it.