How To Fix RSDD_ZA218 - Preprocessing failed

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 218

• Message text: Preprocessing failed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD_ZA218 - Preprocessing failed ?

  The SAP error message RSDD_ZA218, which indicates "Preprocessing failed," typically occurs in the context of SAP BW (Business Warehouse) when there is an issue during the data extraction or transformation process. This error can arise from various causes, and understanding these can help in troubleshooting and resolving the issue.
  Causes of RSDD_ZA218
  
  
  Data Source Issues: The data source from which data is being extracted may be unavailable or incorrectly configured. This could include issues with the underlying database or the data extraction logic.
  
  
  Transformation Errors: There may be errors in the transformation rules defined in the Data Transfer Process (DTP). This could include incorrect mappings or logic that cannot be executed.
  
  
  Data Quality Issues: If the data being processed contains invalid or unexpected values, it can lead to preprocessing failures. This might include null values, data type mismatches, or other integrity issues.
  
  
  Memory or Resource Constraints: Insufficient memory or system resources can lead to failures during the preprocessing stage, especially when dealing with large datasets.
  
  
  Process Chain Issues: If the error occurs within a process chain, there may be issues with the sequence of steps or dependencies between different processes.
  
  
  Authorization Issues: Lack of proper authorizations for the user executing the data load can also lead to failures.
  
  
  Solutions to RSDD_ZA218
  
  
  Check Data Source: Verify that the data source is correctly configured and accessible. Ensure that the underlying database is up and running.
  
  
  Review Transformation Logic: Examine the transformation rules in the DTP for any errors. Make sure that all mappings are correct and that there are no logical errors in the transformation.
  
  
  Data Quality Checks: Perform data quality checks on the source data to identify and correct any invalid or unexpected values. This may involve cleaning the data or adjusting the extraction logic.
  
  
  Monitor System Resources: Check the system's memory and resource usage. If necessary, optimize the process or increase the available resources.
  
  
  Process Chain Review: If the error occurs within a process chain, review the entire chain for any misconfigurations or dependencies that may be causing the issue.
  
  
  Authorization Check: Ensure that the user executing the data load has the necessary authorizations to access the data source and perform the required operations.
  
  
  Error Logs: Check the error logs for more detailed information about the failure. This can provide insights into the specific cause of the error.
  
  
  Re-run the Process: After addressing the identified issues, re-run the data load process to see if the error persists.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes related to RSDD_ZA218 for any specific patches or updates that may address known issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review SAP BW documentation for best practices in data extraction and transformation processes.
  
  By systematically addressing the potential causes and applying the suggested solutions, you should be able to resolve the RSDD_ZA218 error and successfully complete the preprocessing step in your SAP BW environment.