How To Fix DMC_GENERAL321 - &1: Parallelization not supported for pool tables and table views

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 321

• Message text: &1: Parallelization not supported for pool tables and table views

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL321 - &1: Parallelization not supported for pool tables and table views ?

  The SAP error message DMC_GENERAL321 indicates that there is an issue with parallel processing in the context of data management, specifically when dealing with pool tables and table views. This error typically arises in scenarios where data is being processed in parallel, but the underlying data structure (pool tables or table views) does not support such operations.
  Cause:
  
  Pool Tables and Table Views: Pool tables and table views are special types of database tables in SAP that are designed to store data in a way that is optimized for certain operations. However, they do not support parallel processing because of their structure and the way data is managed.
  Parallel Processing Attempt: The error occurs when an attempt is made to execute a data operation (like reading or writing) in parallel on these types of tables, which is not allowed.
  
  Solution:
  
  
  Avoid Parallel Processing: Modify the data processing logic to avoid parallel execution when dealing with pool tables or table views. This may involve:
  
  Changing the way data is fetched or updated to ensure that operations are performed sequentially.
  Using standard database tables instead of pool tables or table views if parallel processing is required.
  
  
  
  Check Data Model: Review the data model to ensure that the tables being used are appropriate for the operations being performed. If parallel processing is a requirement, consider redesigning the data model to use transparent tables instead.
  
  
  Error Handling: Implement error handling in your data processing logic to catch this specific error and handle it gracefully, possibly by logging the error and retrying the operation in a non-parallel manner.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on pool tables, table views, and their limitations regarding parallel processing.
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or updates regarding this error message.
  Performance Considerations: If performance is a concern, consider optimizing the data access patterns or using other techniques to improve efficiency without resorting to parallel processing on unsupported table types.
  
  By addressing the root cause of the error and adjusting the data processing logic accordingly, you should be able to resolve the DMC_GENERAL321 error effectively.