How To Fix /SAPAPO/CIF_ERRHDLG603 - Registration of RFC unsuccessful. Last registered RFC: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CIF_ERRHDLG -

• Message number: 603

• Message text: Registration of RFC unsuccessful. Last registered RFC: &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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CIF_ERRHDLG603 - Registration of RFC unsuccessful. Last registered RFC: &1 ?

  The SAP error message /SAPAPO/CIF_ERRHDLG603 indicates that there was an issue with the registration of a Remote Function Call (RFC) in the context of the SAP Advanced Planning and Optimization (APO) system, specifically related to the Core Interface (CIF) between SAP APO and SAP ERP.
  Cause:
  The error message typically arises due to one of the following reasons:
  
  Network Issues: There may be network connectivity problems between the SAP APO system and the SAP ERP system.
  RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect parameters, such as the target system's hostname, system number, or client.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the required operations.
  System Availability: The target system (SAP ERP) may be down or not reachable at the time of the registration attempt.
  SAP Notes: There may be specific SAP Notes that address known issues or bugs related to CIF and RFC registration.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Network Connectivity:
  
  Ensure that the network connection between the SAP APO and SAP ERP systems is stable and functioning correctly. You can use tools like ping or telnet to test connectivity.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI and check the configuration of the RFC destination used for the connection. Ensure that all parameters (like target host, system number, client, user, and password) are correct.
  Test the RFC connection from SM59 to ensure it is working properly.
  
  
  
  Check Authorizations:
  
  Verify that the user credentials used for the RFC connection have the necessary authorizations to access the required functions in both the SAP APO and SAP ERP systems.
  
  
  
  Check System Availability:
  
  Ensure that the target SAP ERP system is up and running. You can check the system status in transaction SM51 or by logging into the SAP ERP system directly.
  
  
  
  Review SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. Implement any recommended fixes or patches.
  
  
  
  Check Logs:
  
  Review the application logs in transaction SLG1 for any additional error messages or details that could provide more context about the issue.
  
  
  
  Restart Services:
  
  If the issue persists, consider restarting the relevant services or the entire SAP system, as this can sometimes resolve transient issues.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destination Configuration
  SLG1: Application Log
  SM51: List of Active Instances
  
  
  SAP Notes: Always check for the latest SAP Notes related to CIF and RFC issues, as they may provide specific guidance or patches.
  Documentation: Refer to the SAP Help Portal for documentation on CIF and RFC configurations.
  
  By following these steps, you should be able to identify and resolve the cause of the /SAPAPO/CIF_ERRHDLG603 error message.