How To Fix APERB018 - System error: Entry &1 not found in internal table &2

SAP Error Message - Details

• Message type: E = Error

• Message class: APERB - Error Messages for Periodic Posting Run

• Message number: 018

• Message text: System error: Entry &1 not found in internal table &2

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message APERB018 - System error: Entry &1 not found in internal table &2 ?

  The SAP error message APERB018, which states "System error: Entry &1 not found in internal table &2," typically indicates that the system is trying to access an entry in an internal table that does not exist. This can occur in various contexts, such as during data processing, report generation, or when executing specific transactions.
  Causes:
  
  Data Integrity Issues: The entry that the system is trying to access may have been deleted or not created due to a previous error.
  Configuration Errors: Incorrect configuration settings in the system can lead to missing entries in internal tables.
  Custom Code Issues: If there are custom developments (ABAP programs, enhancements, etc.), they may not handle certain scenarios correctly, leading to missing entries.
  Transport Issues: If the system has recently undergone a transport of changes, some objects may not have been transported correctly, leading to inconsistencies.
  Database Issues: Problems with the database, such as corruption or connectivity issues, can also lead to missing data.
  
  Solutions:
  
  Check Data Integrity: Verify that the data expected to be in the internal table is indeed present. This may involve checking related tables or logs.
  Review Configuration: Ensure that all necessary configuration settings are correctly set up and that no required entries are missing.
  Debugging: If the error occurs in a custom program, use the ABAP debugger to trace the execution and identify where the missing entry is being referenced.
  Check Transport Logs: If the issue arose after a transport, review the transport logs to ensure that all objects were transported successfully.
  Consult SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches.
  System Logs: Check the system logs (transaction SLG1) for any related error messages that could provide more context about the issue.
  Contact SAP Support: If the issue persists and cannot be resolved internally, consider reaching out to SAP Support for assistance.
  
  Related Information:
  
  Transaction Codes: Depending on where the error occurs, you may want to check specific transaction codes related to the module you are working with (e.g., MM, SD, FI).
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues faced by other users and potential solutions.
  Documentation: Review the relevant SAP documentation for the module or functionality you are working with to ensure that all prerequisites and configurations are met.
  
  By following these steps, you should be able to diagnose and potentially resolve the APERB018 error in your SAP system.