How To Fix SR446 - Outbound t/qRFC UCON RFC rejected

SAP Error Message - Details

• Message type: E = Error

• Message class: SR - RFC utilities

• Message number: 446

• Message text: Outbound t/qRFC UCON RFC rejected

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 SR446 - Outbound t/qRFC UCON RFC rejected ?

  The SAP error message SR446, which indicates "Outbound t/qRFC UCON RFC rejected," typically occurs in the context of asynchronous communication between SAP systems using the qRFC (queued Remote Function Call) mechanism. This error can arise due to various reasons, and understanding the cause is crucial for resolving the issue.
  Causes of SR446 Error
  
  
  Connection Issues: The RFC destination may not be correctly configured, or there may be network issues preventing communication between the systems.
  
  
  Authorization Problems: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  
  
  Queue Management: If the queue is not properly managed or if there are issues with the queue itself (e.g., it is full or not processing messages), this error can occur.
  
  
  System Configuration: Incorrect settings in the SAP system configuration related to qRFC or the logical system settings can lead to this error.
  
  
  Resource Limitations: The target system may be experiencing resource limitations (e.g., memory, CPU) that prevent it from processing the request.
  
  
  Transport Layer Issues: Problems in the transport layer, such as firewall settings or incorrect routing, can also lead to this error.
  
  
  Solutions to SR446 Error
  
  
  Check RFC Destination:
  
  Verify the configuration of the RFC destination in transaction SM59. Ensure that the connection parameters are correct and that the connection is working (test the connection).
  
  
  
  Review Authorizations:
  
  Ensure that the user used for the RFC connection has the necessary authorizations to execute the required functions.
  
  
  
  Monitor Queue Status:
  
  Use transaction SMQ1 (for outbound queues) and SMQ2 (for inbound queues) to monitor the status of the queues. Check for any stuck or failed messages and resolve them.
  
  
  
  Check System Logs:
  
  Review the system logs (transaction SM21) and the qRFC logs for any additional error messages that may provide more context about the issue.
  
  
  
  Resource Monitoring:
  
  Check the performance and resource utilization of the target system. Ensure that it is not overloaded and can handle incoming requests.
  
  
  
  Network Configuration:
  
  Verify network settings, including firewalls and routing, to ensure that there are no blocks preventing communication between the systems.
  
  
  
  SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Restart Services:
  
  In some cases, restarting the relevant services or the entire SAP system may help resolve transient issues.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SMQ1: Outbound Queue Monitoring
  SMQ2: Inbound Queue Monitoring
  SM21: System Log
  SLG1: Application Log
  
  
  
  Documentation: Refer to SAP Help documentation for qRFC and RFC communication for more detailed information on configuration and troubleshooting.
  
  
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to identify the root cause of the SR446 error and implement an appropriate solution.