How To Fix KP021 - System error: Error when reading internal table

SAP Error Message - Details

• Message type: E = Error

• Message class: KP - CO-OM Planning

• Message number: 021

• Message text: System error: Error when reading internal table

What causes this issue?

A program error occurred during revaluation. No entry was found in an
internal table for &V1& (table &v2&).

System Response

Processing is terminated.

How to fix this error?

Inform your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KP021 - System error: Error when reading internal table ?

  The SAP error message KP021, which states "System error: Error when reading internal table," typically indicates that there is an issue with the internal data structures used by the SAP system. This error can occur in various contexts, often related to the configuration or processing of cost planning or controlling (CO) functions.
  Causes:
  
  Data Corruption: The internal table may have become corrupted due to a system error or an inconsistency in the database.
  Memory Issues: Insufficient memory or resources allocated to the SAP system can lead to problems when trying to read internal tables.
  Program Errors: There may be a bug in the ABAP program that is trying to access the internal table, leading to unexpected behavior.
  Configuration Issues: Incorrect configuration settings in the controlling module can lead to errors when the system attempts to read or process data.
  Database Issues: Problems with the underlying database, such as locks or inconsistencies, can also lead to this error.
  
  Solutions:
  
  Check for System Updates: Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for known issues.
  Review ABAP Code: If you have access to the ABAP code that is generating the error, review it for any potential issues, such as incorrect handling of internal tables.
  Check Configuration: Review the configuration settings in the controlling module to ensure they are set up correctly.
  Monitor System Resources: Check the system's memory and resource usage to ensure that it is not running low on resources.
  Database Consistency Check: Run database consistency checks to identify and resolve any underlying issues with the database.
  SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may address this specific error. SAP Notes often provide solutions or workarounds for known issues.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including transaction codes, steps to reproduce the error, and any relevant logs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes related to controlling and cost planning, such as KP06 (Cost Center Planning) or KP26 (Activity Type Planning).
  Debugging: If you have access to debugging tools, you can use the ABAP debugger to step through the code and identify where the error occurs.
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to diagnose and resolve the KP021 error in your SAP system.