How To Fix OE421 - Internal Error: List No &1

SAP Error Message - Details

• Message type: E = Error

• Message class: OE - IS-Oil: ITA/TPI messages

• Message number: 421

• Message text: Internal Error: List No &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.

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 OE421 - Internal Error: List No &1 ?

  The SAP error message OE421 "Internal Error: List No &1" typically indicates that there is an issue with the internal processing of a list or report in the SAP system. This error can occur in various contexts, such as during the execution of reports, transactions, or when generating output lists.
  Possible Causes:
  
  Data Inconsistency: There may be inconsistencies or corruption in the data being processed, which can lead to internal errors.
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to unexpected behavior and errors.
  Program Errors: There may be bugs or issues in the ABAP program or report that is generating the list.
  Memory Issues: Insufficient memory or resources allocated to the SAP system can cause internal errors during processing.
  Version Compatibility: If you are using an outdated version of SAP or if there are compatibility issues with add-ons or custom developments, this error may occur.
  
  Solutions:
  
  Check for Data Issues: Review the data being processed for any inconsistencies or errors. Ensure that all required fields are populated correctly.
  Review Configuration: Verify the configuration settings related to the transaction or report that is generating the error. Make sure they are set up correctly.
  Debugging: If you have access to the ABAP code, you can debug the program to identify the exact point of failure. Look for any unhandled exceptions or logic errors.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. SAP frequently releases patches and updates that can resolve known issues.
  System Resources: Monitor the system resources (memory, CPU usage) to ensure that the SAP system has adequate resources to process the request.
  Contact SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  Related Information:
  
  Transaction Codes: Depending on where the error occurs, you may want to check specific transaction codes related to the report or process you are working with.
  Logs: Review the application logs (transaction SLG1) and system logs (transaction SM21) for any additional error messages or warnings that may provide more context.
  User Authorizations: Ensure that the user executing the transaction has the necessary authorizations to access the data and execute the report.
  
  By following these steps, you should be able to diagnose and potentially resolve the OE421 error in your SAP system.