How To Fix MCEX154 - Extraction queue processing started &1 with &2 LUWs

SAP Error Message - Details

• Message type: E = Error

• Message class: MCEX - Extraction Interface LIS/BW

• Message number: 154

• Message text: Extraction queue processing started &1 with &2 LUWs

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MCEX154 - Extraction queue processing started &1 with &2 LUWs ?

  The SAP error message MCEX154 indicates that there is an issue related to the extraction queue processing in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence). The message typically states that the extraction queue processing has started with a certain number of Logical Units of Work (LUWs), which can be a sign of issues in data extraction or data transfer processes.
  Cause:
  
  Data Extraction Issues: The error may arise due to problems in the data extraction process from the source system. This could be due to incorrect configurations, missing data, or issues with the source system itself.
  Queue Overload: If there are too many LUWs in the extraction queue, it may indicate that the system is overwhelmed with requests, leading to delays or failures in processing.
  Technical Issues: There could be technical issues such as network problems, database locks, or system performance issues that are affecting the extraction process.
  Configuration Errors: Incorrect settings in the data source or in the extraction process can lead to this error.
  
  Solution:
  
  Monitor the Extraction Queue: Check the extraction queue to see how many LUWs are pending and identify any that are causing issues. You can use transaction codes like RSA7 to monitor the queue.
  Check Source System: Ensure that the source system is functioning correctly and that there are no issues with data availability or connectivity.
  Adjust Queue Settings: If the queue is overloaded, consider adjusting the settings for the extraction process to manage the load better. This may involve increasing the number of parallel processes or optimizing the data extraction logic.
  Review Logs: Check the logs for any additional error messages or warnings that may provide more context about the issue. This can help in diagnosing the root cause.
  Reprocess LUWs: If specific LUWs are causing issues, you may need to reprocess them. This can often be done through the SAP BW administration tools.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error message or provide guidance on best practices for extraction queue management.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA7 (for monitoring the extraction queue), RSMO (for monitoring data loads), and RSPC (for process chains).
  SAP Documentation: Refer to SAP Help documentation for detailed information on data extraction processes and troubleshooting steps.
  Performance Tuning: Consider performance tuning for both the source and target systems to ensure efficient data transfer and processing.
  
  If the issue persists after following these steps, it may be beneficial to engage with SAP support for further assistance.