How To Fix CNV_CDMC_CC016 - Connection to the RFC destination &1 could not be established

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CDMC_CC - CDMC - Messages for the Control Center

• Message number: 016

• Message text: Connection to the RFC destination &1 could not be established

Self-Explanatory Message

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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 CNV_CDMC_CC016 - Connection to the RFC destination &1 could not be established ?

  The SAP error message CNV_CDMC_CC016 indicates that there is an issue with establishing a connection to a Remote Function Call (RFC) destination. This error typically arises in the context of data migration or conversion processes, particularly when using the SAP Conversion Tools.
  Causes:
  
  
  Incorrect 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, client, user credentials, etc.
  
  
  Network Issues: There may be network connectivity issues between the SAP system and the target system. This could be due to firewall settings, network outages, or incorrect routing.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  Target System Down: The target SAP system may be down or not reachable at the moment.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured.
  
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination that is causing the issue.
  Verify the configuration settings, including the target host, system number, client, user, and password.
  
  
  
  Test the Connection:
  
  In transaction SM59, select the RFC destination and use the "Test Connection" option to check if the connection can be established successfully.
  
  
  
  Check Network Connectivity:
  
  Ensure that the network connection between the two systems is functioning properly. You can use tools like ping or telnet to check connectivity to the target system.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations in the target system.
  
  
  
  Check Target System Status:
  
  Verify that the target SAP system is up and running. You can check this by logging into the target system directly.
  
  
  
  Review SAP Gateway Configuration:
  
  Ensure that the SAP Gateway service is running on both the source and target systems. You can check this in transaction SMGW.
  
  
  
  Check for Firewall Issues:
  
  If there are firewalls between the systems, ensure that the necessary ports for RFC communication are open.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destination Configuration
  SMGW: SAP Gateway Monitor
  ST22: Dump Analysis (to check for any related dumps)
  SM21: System Log (to check for any relevant log entries)
  
  
  
  Documentation: Refer to SAP Help documentation for more details on configuring RFC destinations and troubleshooting connectivity issues.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to RFC connections or the CNV_CDMC_CC016 error.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the CNV_CDMC_CC016 error.