How To Fix XC603 - Registration of RFC failed. Last registered RFC: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: XC - Message Class for Core Interface

• Message number: 603

• Message text: Registration of RFC failed. Last registered RFC: &1

What causes this issue?

The system has determined that not all RFCs of the
<DS:GLOS.8554C86B3BAACE42817DEADBB261F52A>qRFC LUW</> currently being
processed are registered with
<DS:GLOS.180AC48E4BA2464C960A5297D9F7AAE3>C

System Response

C

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message XC603 - Registration of RFC failed. Last registered RFC: &1 ?

  The SAP error message XC603 indicates that there was a failure in the registration of a Remote Function Call (RFC) destination. This error typically occurs when the system is unable to register an RFC connection, which can be due to various reasons. Below are some common causes, potential solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Configuration Errors: Incorrect configuration of the RFC destination in transaction SM59.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  System Load: The target system may be overloaded or down, preventing the registration of the RFC.
  Incorrect Parameters: The parameters set in the RFC destination may be incorrect or incomplete.
  Firewall Restrictions: Firewalls or security settings may be blocking the RFC communication.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to verify that the target system is reachable from the SAP system.
  
  
  
  Review RFC Destination Configuration:
  
  Go to transaction SM59 and check the configuration of the RFC destination that is failing. Ensure that all parameters (like target host, system number, client, user, and password) are correctly set.
  
  
  
  Test RFC Connection:
  
  In SM59, select the RFC destination and use the "Connection Test" option to check if the connection can be established successfully.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  
  
  
  Monitor System Load:
  
  Check the performance and load of the target system. If it is down or overloaded, you may need to wait until it is back online or address performance issues.
  
  
  
  Firewall and Security Settings:
  
  Verify that there are no firewall rules or security settings that are blocking the RFC communication between the systems.
  
  
  
  Check SAP Notes:
  
  Look for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SMLG: Logon Groups
  
  
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed documentation on RFC connections 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 diagnose and resolve the XC603 error related to RFC registration in your SAP system.