How To Fix DMC_GENERAL421 - Access plan is calculated for table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 421

• Message text: Access plan is calculated for table &1

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 DMC_GENERAL421 - Access plan is calculated for table &1 ?

  The SAP error message DMC_GENERAL421, which states "Access plan is calculated for table &1," typically occurs in the context of data management and data processing within SAP systems, particularly when dealing with data migration or data replication tasks. This message indicates that the system is attempting to generate an access plan for a specific database table, but there may be issues that prevent it from completing successfully.
  Cause:
  
  Database Table Issues: The table specified in the error message may have structural issues, such as missing indexes or constraints that affect the access plan generation.
  Performance Issues: The database may be under heavy load, causing delays or failures in generating the access plan.
  Configuration Problems: There may be misconfigurations in the data management settings or in the database connection parameters.
  Data Volume: Large volumes of data in the specified table can lead to performance bottlenecks when calculating the access plan.
  Version Compatibility: There may be compatibility issues between the SAP version and the database version being used.
  
  Solution:
  
  Check Table Structure: Verify the structure of the table mentioned in the error message. Ensure that all necessary indexes and constraints are in place.
  Database Performance: Monitor the performance of the database. If it is under heavy load, consider optimizing queries or increasing resources.
  Configuration Review: Review the configuration settings for data management and ensure that they are correctly set up.
  Data Volume Management: If the table contains a large amount of data, consider partitioning the table or archiving old data to improve performance.
  Database Statistics: Update the database statistics to help the optimizer generate a better access plan.
  SAP Notes: Check for any relevant SAP Notes or patches that may address this specific error or improve the functionality related to access plan generation.
  Consult Documentation: Refer to SAP documentation for specific guidelines on handling access plan issues.
  
  Related Information:
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with the error message details and any relevant logs.
  Transaction Codes: Familiarize yourself with transaction codes related to data management, such as DMC (Data Management Cockpit) or ST22 (Dump Analysis) for further analysis.
  Performance Tuning: Look into performance tuning techniques for your specific database (e.g., Oracle, HANA, SQL Server) to enhance overall system performance.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the DMC_GENERAL421 error message in your SAP environment.