How To Fix VELO021 - There is already an entry in VLCQUEUE with the same key

SAP Error Message - Details

• Message type: E = Error

• Message class: VELO - Vehicle Management System

• Message number: 021

• Message text: There is already an entry in VLCQUEUE with the same key

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 VELO021 - There is already an entry in VLCQUEUE with the same key ?

  The SAP error message VELO021 indicates that there is already an entry in the VLCQUEUE table with the same key. This typically occurs in the context of the SAP Vehicle Logistics (VLC) module, which is used for managing vehicle-related processes.
  Cause:
  The error usually arises due to one of the following reasons:
  
  Duplicate Entries: An attempt is being made to insert a record into the VLCQUEUE table that already exists. This can happen if the same process is triggered multiple times or if there is a programming error that leads to duplicate entries.
  Concurrency Issues: If multiple processes or users are trying to insert the same entry simultaneously, it can lead to this error.
  Data Integrity Issues: There may be issues with the data being processed, leading to conflicts in the keys used for the VLCQUEUE entries.
  
  Solution:
  To resolve the VELO021 error, you can take the following steps:
  
  
  Check Existing Entries: 
  
  Use transaction codes like SE16 or SE11 to view the contents of the VLCQUEUE table. Look for entries that match the key you are trying to insert.
  Identify if the entry is indeed a duplicate and if it can be safely removed or updated.
  
  
  
  Review the Process Logic:
  
  If the error is due to a programming issue, review the logic in the ABAP code or the configuration that is responsible for inserting records into the VLCQUEUE. Ensure that checks are in place to prevent duplicate entries.
  
  
  
  Implement Error Handling:
  
  If the error is due to concurrency, consider implementing error handling in your code to manage such situations gracefully. This could involve retry mechanisms or locking strategies.
  
  
  
  Data Cleanup:
  
  If there are stale or erroneous entries in the VLCQUEUE table, consider cleaning them up. However, ensure that you understand the implications of deleting records from this table.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the VLC module for any known issues or patches that might address this error.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They may provide insights based on the specific version of SAP you are using.
  
  
  
  Related Information:
  
  Transaction Codes: SE16 (Data Browser), SE11 (Data Dictionary), SM21 (System Log), ST22 (Dump Analysis).
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on handling VLCQUEUE entries.
  VLC Module Documentation: Review the official SAP documentation for the Vehicle Logistics module for best practices and troubleshooting tips.
  
  By following these steps, you should be able to diagnose and resolve the VELO021 error effectively.