How To Fix UW001 - Internal error: I_LINES = &1, I_DUMMY_LINES = &2

SAP Error Message - Details

• Message type: E = Error

• Message class: UW - CO Authorization Toolbox

• Message number: 001

• Message text: Internal error: I_LINES = &1, I_DUMMY_LINES = &2

What causes this issue?

An error occurred when validating the authorizations.

System Response

The system terminates the processing.

How to fix this error?

Contact the SAP Hotline.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UW001 - Internal error: I_LINES = &1, I_DUMMY_LINES = &2 ?

  The SAP error message "UW001 Internal error: I_LINES = &1, I_DUMMY_LINES = &2" typically indicates an internal inconsistency or unexpected condition within the SAP system, particularly related to the handling of internal tables or data structures. This error can occur in various contexts, such as during data processing, report generation, or when executing certain transactions.
  Cause:
  
  Data Inconsistency: The error may arise due to inconsistencies in the data being processed, such as unexpected null values or incorrect data types.
  Program Logic Error: There may be a bug or logical error in the ABAP program or report that is causing the internal tables to be populated incorrectly.
  Memory Issues: Insufficient memory or issues with the internal handling of data structures can also lead to this error.
  Custom Code: If there are custom enhancements or modifications in the system, they might be causing the error due to improper handling of data.
  
  Solution:
  
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and patches, as this may resolve known issues.
  Review Custom Code: If the error occurs in a custom program, review the code for any logical errors or incorrect handling of internal tables.
  Data Validation: Validate the data being processed to ensure there are no inconsistencies or unexpected values.
  Debugging: Use the ABAP debugger to trace the execution of the program and identify where the error occurs. Look for the values of I_LINES and I_DUMMY_LINES to understand the context of the error.
  SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be known issues and recommended solutions or workarounds.
  Contact SAP Support: If the issue persists and cannot be resolved through the above steps, 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 functionality you are using (e.g., SE80 for ABAP development, SE37 for function modules).
  Logs and Traces: Check system logs (transaction SLG1) and short dumps (transaction ST22) for additional information that may provide context for the error.
  Performance Considerations: If the error is related to performance, consider analyzing the performance of the program and optimizing it if necessary.
  
  By following these steps, you should be able to diagnose and potentially resolve the "UW001 Internal error" in your SAP system.