How To Fix /IWNGW/CM_HUB019 - BG RFC Queue: Duplicate queue id generated

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 019

• Message text: BG RFC Queue: Duplicate queue id generated

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 /IWNGW/CM_HUB019 - BG RFC Queue: Duplicate queue id generated ?

  The SAP error message /IWNGW/CM_HUB019 BG RFC Queue: Duplicate queue id generated typically indicates that there is an issue with the generation of background RFC (Remote Function Call) queue IDs in the SAP system. This can occur in scenarios where multiple processes are trying to create or access the same queue ID, leading to a conflict.
  Cause:
  
  Concurrency Issues: Multiple processes or threads may be trying to create a queue with the same ID simultaneously.
  Configuration Errors: Incorrect configuration settings in the SAP system related to background processing or RFC settings.
  System Bugs: There may be bugs in the SAP version you are using that lead to improper handling of queue IDs.
  Database Issues: Problems with the underlying database that affect the generation of unique identifiers.
  
  Solution:
  
  Check for Concurrency: Review the processes that are generating the queue IDs. Ensure that they are not running concurrently in a way that could lead to duplication.
  Review Configuration: Check the configuration settings for background processing and RFC in your SAP system. Ensure that they are set up correctly.
  Update SAP System: If you are running an older version of SAP, consider applying the latest patches or updates. SAP often releases notes that address known issues.
  Monitor Background Jobs: Use transaction codes like SM37 to monitor background jobs and identify any that may be causing conflicts.
  Check SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be specific fixes or workarounds provided by SAP.
  Database Integrity Check: Perform a check on the database to ensure that there are no integrity issues that could be causing the duplication of queue IDs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SMQ1 (for outbound queues) and SMQ2 (for inbound queues) to monitor and manage RFC queues.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed logs and error messages to facilitate troubleshooting.
  Documentation: Review the SAP documentation related to background processing and RFC to understand the expected behavior and configuration settings.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.