How To Fix CNV_10100104 - RFC connection to control system not available; return code(SY-SUBRC)= &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10100 - Messages from package 10100

• Message number: 104

• Message text: RFC connection to control system not available; return code(SY-SUBRC)= &1

What causes this issue?

The system requires an RFC connection to the control system.

System Response

The program aborts due to the RFC error.

How to fix this error?

Check your RFC settings.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10100104 - RFC connection to control system not available; return code(SY-SUBRC)= &1 ?

  The SAP error message CNV_10100104 indicates that there is an issue with the Remote Function Call (RFC) connection to the control system. The return code (SY-SUBRC) provides additional information about the nature of the problem. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the control system.
  RFC Destination Configuration: The RFC destination may not be correctly configured in the SAP system.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  Control System Down: The control system may be down or not reachable due to maintenance or other issues.
  Firewall Restrictions: Firewalls may be blocking the connection between the two systems.
  Incorrect Parameters: The parameters set in the RFC destination may be incorrect or incomplete.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the control system is reachable from the SAP system.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination that is being used to connect to the control system.
  Test the connection using the "Connection Test" option in SM59.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the control system.
  
  
  
  Check Control System Status:
  
  Verify that the control system is up and running. If it is down, coordinate with the relevant team to bring it back online.
  
  
  
  Firewall Configuration:
  
  Check if there are any firewall rules that might be blocking the connection. Work with your network/security team to ensure that the necessary ports are open.
  
  
  
  Correct RFC Parameters:
  
  Review the parameters in the RFC destination for any incorrect settings, such as the target host, system number, or client.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage and test RFC destinations.
  ST22: To check for dumps that might provide more context on the error.
  SM21: To review system logs for any related error messages.
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  Documentation: Review the SAP documentation for RFC connections and troubleshooting RFC issues for more detailed guidance.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the CNV_10100104 error message. If the problem persists, consider reaching out to SAP support for further assistance.