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

CNVMBTRFC139 - Overview

• 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.

CNVMBTRFC139 - Details

• 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