How To Fix D3045 - RFC: Answer not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 045

• Message text: RFC: Answer not possible

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 D3045 - RFC: Answer not possible ?

  The SAP error message D3045, which states "RFC: Answer not possible," typically occurs in the context of Remote Function Calls (RFC) when there is an issue with the communication between the SAP system and the external system or between different SAP systems. This error can arise due to various reasons, including configuration issues, network problems, or issues with the RFC destination.
  Causes:
  
  RFC Destination Configuration: The RFC destination may not be configured correctly. This includes incorrect parameters such as the target system's IP address, system number, or client number.
  Network Issues: There may be network connectivity issues between the systems involved in the RFC call.
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations to execute the requested function.
  Function Module Issues: The function module being called may not be available or may have been incorrectly defined in the target system.
  System Load: The target system may be under heavy load, causing it to be unable to process the RFC request in a timely manner.
  Timeout Settings: The timeout settings for the RFC call may be too short, leading to premature termination of the request.
  
  Solutions:
  
  Check RFC Destination: Verify the configuration of the RFC destination in transaction SM59. Ensure that all parameters are correct and that the connection test is successful.
  Network Connectivity: Check the network connection between the systems. Use tools like ping or traceroute to diagnose any connectivity issues.
  User Authorizations: Ensure that the user ID used for the RFC call has the necessary authorizations to execute the function module in the target system.
  Function Module Availability: Check if the function module being called is active and correctly defined in the target system. You can do this using transaction SE37 or SE80.
  Monitor System Load: Use transaction SM50 or SM66 to monitor the load on the target system. If the system is overloaded, consider optimizing performance or scheduling the RFC calls during off-peak hours.
  Adjust Timeout Settings: If necessary, increase the timeout settings for the RFC call in the relevant configuration.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59: Manage RFC destinations.
  SM50: Monitor work processes.
  SM66: Monitor global work processes.
  SE37: Function module maintenance.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to RFC communication or the D3045 error.
  Logs: Review the system logs (transaction SM21) and the developer trace files (transaction ST11) for additional error messages or warnings that may provide more context.
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.