How To Fix WRF_UPGRADE_MSG015 - Unexpected error while starting remote function call &4

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_UPGRADE_MSG -

• Message number: 015

• Message text: Unexpected error while starting remote function call &4

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 WRF_UPGRADE_MSG015 - Unexpected error while starting remote function call &4 ?

  The SAP error message WRF_UPGRADE_MSG015 indicates that there was an unexpected error while starting a remote function call (RFC). This error can occur in various contexts, often related to issues with the configuration or communication between systems in an SAP landscape.
  Possible Causes:
  
  Network Issues: Problems with network connectivity between the SAP systems can lead to RFC errors.
  Configuration Errors: Incorrect settings in the RFC destination or in the SAP system configuration can cause this error.
  Authorization Issues: The user or service account used for the RFC call may not have the necessary authorizations.
  System Load: High load on the SAP system can lead to timeouts or failures in processing RFC calls.
  Version Mismatch: Incompatibility between different SAP system versions or components can lead to unexpected errors.
  Transport Layer Issues: Problems with the transport layer or middleware that handles the RFC calls.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems involved in the RFC call. Use tools like ping or traceroute to diagnose network issues.
  Review RFC Destination Configuration: Go to transaction SM59 and check the configuration of the RFC destination. Ensure that the settings (like target host, system number, client, user, and password) are correct.
  Check Authorizations: Verify that the user account used for the RFC call has the necessary authorizations. You can check this in transaction SU01 or PFCG.
  Monitor System Performance: Use transaction SM50 or SM66 to monitor system performance and check for any long-running processes or high resource usage.
  Check System Logs: Review the system logs (transaction SM21) and the developer trace files (transaction ST22) for any additional error messages or clues related to the issue.
  Update SAP Components: Ensure that all relevant SAP components are up to date and compatible with each other. Check for any available patches or updates.
  Test RFC Connection: In transaction SM59, you can test the RFC connection to see if it is working correctly. This can help identify if the issue is with the connection itself.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for RFC and related components to ensure that your configuration aligns with best practices.
  
  If the issue persists after trying the above solutions, it may be necessary to involve SAP support for further investigation.