How To Fix CNVMBTRFC139 - Affected connection from &1 to &2 with destination &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBTRFC - Messages used in RFC Management and its objects

• Message number: 139

• Message text: Affected connection from &1 to &2 with destination &3

What causes this issue?

The RFC destination check done for a SAP LT System Landscape got an
error message that belongs to the connection from a System to another or
the same System. To establish the connection from System to System the
destination mentioned in the message is used. Depending on the erro
message the best approach to find the error causing issue is to check
the destination in the system mentioned after 'from' with the
transaction SM59. In this transaction run the authorization check. via
menu: utilities(M)->test->authorization test (CTRL + F3). The check
returns a message which describes any issues with the RFC destination.

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

System Response

How to fix this error?

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 CNVMBTRFC139 - Affected connection from &1 to &2 with destination &3 ?

  The SAP error message CNVMBTRFC139 typically indicates an issue with a Remote Function Call (RFC) connection in the context of a data migration or conversion process. This error message suggests that there is a problem with the connection between two systems or clients, which is often related to the destination specified in the RFC configuration.
  Cause:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  RFC Destination Configuration: The RFC destination might not be correctly configured in the SAP system. This includes incorrect parameters such as the target system's hostname, service, or system number.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the required operations.
  System Availability: The target system might be down or not reachable due to maintenance or other issues.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection between the two systems.
  
  Solution:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the two systems. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination specified in the error message.
  Ensure that the connection type, target host, and service are correctly set.
  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 target system.
  Check System Status: Verify that the target system is up and running. You can check the status of the system in transaction SM51 or by contacting the system administrator.
  Firewall and Security Settings: If applicable, check firewall settings to ensure that the required ports for RFC communication are open.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: To manage and test RFC destinations.
  SM51: To view active application servers.
  ST22: To check for dumps that might provide more context on the error.
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections or the CNVMBTRFC139 error.
  Documentation: Review SAP documentation on RFC connections and troubleshooting steps for connectivity issues.
  
  If the problem persists after checking the above points, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.