How To Fix RSDA_SDB021 - Data package &1 opened for writing to proxy table &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDA_SDB - Messages for near-line reference implementation for MaxDB

• Message number: 021

• Message text: Data package &1 opened for writing to proxy table &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDA_SDB021 - Data package &1 opened for writing to proxy table &2 ?

  The SAP error message RSDA_SDB021 indicates that a data package is opened for writing to a proxy table. This typically occurs in the context of SAP Data Services or SAP BW (Business Warehouse) when there is an issue with data loading or data extraction processes.
  Cause:
  
  Concurrent Access: The error may arise if multiple processes are trying to write to the same proxy table simultaneously. This can happen if there are overlapping data loads or if a previous data load has not completed successfully.
  Locking Issues: The proxy table may be locked by another process, preventing the current process from writing to it.
  Configuration Issues: There may be misconfigurations in the data flow or data extraction settings that lead to this error.
  Resource Limitations: Insufficient system resources (like memory or disk space) can also lead to issues when trying to write data.
  
  Solution:
  
  Check for Concurrent Processes: Verify if there are any other data load processes running that might be accessing the same proxy table. If so, wait for those processes to complete before retrying.
  Release Locks: If the table is locked, you may need to identify the locking session and release it. This can be done using transaction codes like SM12 (to view locks) and SM21 (to check system logs).
  Review Data Flow Configuration: Check the configuration of your data flow or extraction process to ensure that it is set up correctly and that there are no errors in the mapping or transformation logic.
  Monitor System Resources: Ensure that your system has adequate resources available. Check for memory usage, disk space, and other performance metrics.
  Retry the Process: After addressing the above issues, retry the data load process to see if the error persists.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SM37: To monitor background jobs and check for any failed jobs.
  ST22: To check for dumps that might provide more context on the error.
  SLG1: To view application logs that may contain additional information about the error.
  
  
  Documentation: Review SAP documentation related to Data Services and BW for best practices on data loading and error handling.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.