How To Fix RLFW420 - Callback executed for aRFC task &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: RLFW - Messages for runlevel framework

• Message number: 420

• Message text: Callback executed for aRFC task &1.

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 RLFW420 - Callback executed for aRFC task &1. ?

  The SAP error message RLFW420, which states "Callback executed for aRFC task &1," typically relates to issues with asynchronous Remote Function Call (aRFC) processing in SAP. This error can occur in various scenarios, often indicating that there was a problem with the execution of a callback function for an aRFC task.
  Causes:
  
  Network Issues: Problems with network connectivity between the SAP systems can lead to a failure in executing the aRFC task.
  Configuration Errors: Incorrect configuration of the RFC destinations or the aRFC settings in the SAP system can cause this error.
  Resource Limitations: Insufficient system resources (like memory or processing power) can lead to failures in executing aRFC tasks.
  Timeouts: If the aRFC task takes too long to execute, it may time out, leading to this error.
  Code Issues: Bugs or issues in the ABAP code that is being executed as part of the aRFC task can also trigger this error.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the systems involved in the aRFC call. You can use tools like ping or traceroute to diagnose connectivity problems.
  Review RFC Configuration: Verify the configuration of the RFC destinations in transaction SM59. Ensure that the settings are correct and that the connection is working properly.
  Monitor System Resources: Use transaction SM50 or SM66 to monitor system performance and check for any resource bottlenecks. If necessary, optimize the system or increase resources.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings for the aRFC calls in the relevant configuration.
  Debug ABAP Code: If the error is related to specific ABAP code, use the debugger to step through the code and identify any issues that may be causing the failure.
  Check Logs: Review the application logs (transaction SLG1) and system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM59 (RFC destinations), SM50 (process overview), SM66 (global process overview), and SLG1 (application log).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address known issues related to aRFC and the specific error message.
  Documentation: Review SAP documentation on aRFC and related concepts to better understand how they work and how to troubleshoot issues.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.