How To Fix IUUC_CDC_API003 - RFC Destination &1: Communication error: &2

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_CDC_API - SLT CDC API Messages

• Message number: 003

• Message text: RFC Destination &1: Communication error: &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_CDC_API003 - RFC Destination &1: Communication error: &2 ?

  The SAP error message IUUC_CDC_API003 indicates a communication error with a specified RFC (Remote Function Call) destination. This error typically arises in the context of SAP Landscape Transformation (SLT) or Change Data Capture (CDC) scenarios, where data is replicated from one system to another.
  Cause:
  The error message can be caused by several factors, including:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  RFC Destination Configuration: The RFC destination may not be configured correctly, or it may be inactive.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  System Availability: The target system may be down or not reachable.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the systems.
  SAP Notes: There may be specific SAP Notes that address known issues related to the RFC destination.
  
  Solution:
  To resolve the IUUC_CDC_API003 error, you can follow these steps:
  
  
  Check Network Connectivity:
  
  Ensure that both systems can communicate over the network. You can use tools like ping or telnet to test connectivity.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination specified in the error message.
  Test the connection using the "Test Connection" button to see if it is working properly.
  
  
  
  Check User Authorizations:
  
  Ensure that the user specified in the RFC destination has the necessary authorizations to perform the required operations.
  
  
  
  Check System Status:
  
  Verify that the target system is up and running. You can check the system status in transaction SM51 or by logging into the target system.
  
  
  
  Review Firewall Settings:
  
  If applicable, check the firewall settings to ensure that the necessary ports for SAP communication are open.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes that may provide additional insights or fixes related to this error. You can use the SAP Support Launchpad to find notes.
  
  
  
  Check Logs:
  
  Review the logs in transaction SLG1 for any additional error messages that may provide more context about the issue.
  
  
  
  Restart Services:
  
  If the issue persists, consider restarting the relevant services or the entire SAP system, if feasible.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destination Configuration
  SLG1: Application Log
  SM51: List of SAP Servers
  
  
  Documentation: Refer to SAP Help documentation for SLT and CDC for more detailed information on configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums for discussions and solutions related to similar issues.
  
  By following these steps, you should be able to diagnose and resolve the IUUC_CDC_API003 error effectively.