How To Fix XC602 - Registration for RFC &1 from &2 of the qRFC LUW with ID &3

SAP Error Message - Details

• Message type: E = Error

• Message class: XC - Message Class for Core Interface

• Message number: 602

• Message text: Registration for RFC &1 from &2 of the qRFC LUW with ID &3

What causes this issue?

This message provides technical information for analysis.

System Response

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

How to fix this error?

Procedure for System Administrators

Technical information:
Transaction ID of qRFC LUW: &V3&
Number of RFC currently being processed: &V1&
Total number of RFCs in the qRFC LUW: &V2&

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message XC602 - Registration for RFC &1 from &2 of the qRFC LUW with ID &3 ?

  The SAP error message XC602 typically relates to issues with the registration of Remote Function Calls (RFC) in the context of a queued Remote Function Call (qRFC) Logical Unit of Work (LUW). This error can occur when there are problems with the communication between systems or when the qRFC infrastructure is not functioning as expected.
  Cause:
  
  Network Issues: There may be network connectivity problems between the systems involved in the RFC call.
  Configuration Issues: The RFC destination may not be correctly configured, or the qRFC settings may not be properly set up.
  System Load: High system load or performance issues can lead to timeouts or failures in processing the qRFC LUW.
  Authorization Issues: The user or system may not have the necessary authorizations to perform the requested operation.
  System Errors: There may be underlying system errors or inconsistencies in the SAP environment.
  
  Solution:
  
  Check Network Connectivity: Ensure that there are no network issues between the systems. You can use tools like ping or telnet to verify connectivity.
  Review RFC Configuration: Check the RFC destination settings in transaction SM59. Ensure that the destination is correctly configured and that the connection test is successful.
  Monitor System Performance: Use transaction SM50 or SM66 to monitor system performance and check for any long-running processes that may be causing delays.
  Check Authorizations: Verify that the user or system has the necessary authorizations to execute the qRFC LUW. You can use transaction SU53 to analyze authorization issues.
  Review qRFC Settings: Check the qRFC settings in transaction SMQ1 (for outbound queues) and SMQ2 (for inbound queues) to ensure that there are no stuck or failed entries.
  Analyze Logs: Look at the system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages or warnings that could provide more context.
  Restart Services: If the issue persists, consider restarting the relevant services or the entire SAP system if feasible.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SMQ1: Monitor Outbound Queues
  SMQ2: Monitor Inbound Queues
  SM21: System Log
  SLG1: Application Log
  SM50/SM66: Process Overview
  
  
  Documentation: Refer to SAP Help Portal or SAP Notes for specific guidance on qRFC and RFC issues.
  SAP Notes: Search for relevant SAP Notes that may address specific issues related to the XC602 error message.
  
  If the problem persists after following these steps, it may be beneficial to contact SAP support for further assistance.