How To Fix CNVMBTRFC135 - Next message refers to 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: 135

• Message text: Next message refers to connection from &1 to &2 with destination &3

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBTRFC135 - Next message refers to connection from &1 to &2 with destination &3 ?

  The SAP error message CNVMBTRFC135 typically indicates an issue with the Remote Function Call (RFC) connection between two systems. This error is often encountered during data migration or when using the SAP Landscape Transformation (SLT) tool, particularly in scenarios involving data transfer between different SAP systems.
  Cause:
  The error message CNVMBTRFC135 suggests that there is a problem with the RFC connection from one system (source) to another (target). The specific causes can include:
  
  Network Issues: There may be network connectivity problems between the two systems.
  RFC Destination Configuration: The RFC destination might not be correctly configured in the SAP system.
  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 connection.
  Incorrect Parameters: The parameters set in the RFC destination might be incorrect.
  
  Solution:
  To resolve the CNVMBTRFC135 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 traceroute to verify connectivity.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination (the destination mentioned 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 credentials used for the RFC connection have the necessary authorizations to perform the required actions.
  
  
  
  Check System Availability:
  
  Verify that the target system is up and running. You can check the system status in the SAP GUI or through system monitoring tools.
  
  
  
  Review Firewall Settings:
  
  If applicable, check the firewall settings to ensure that the required ports for RFC communication are open.
  
  
  
  Review Parameters:
  
  Double-check the parameters set in the RFC destination for any incorrect entries.
  
  
  
  Consult Logs:
  
  Check the system logs (transaction SM21) and the RFC trace (transaction SM58) for any additional error messages that might provide more context.
  
  
  
  Related Information:
  
  RFC (Remote Function Call): A protocol used in SAP systems to enable communication between different systems.
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SM21: To view system logs.
  SM58: To monitor asynchronous RFC calls.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.