How To Fix CNVMBTRFC133 - Connection to &1 system with time out (check destination &2)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 133

• Message text: Connection to &1 system with time out (check destination &2)

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.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBTRFC133 - Connection to &1 system with time out (check destination &2) ?

  The SAP error message CNVMBTRFC133 indicates that there is a timeout issue when trying to connect to a specified system. This typically occurs in the context of Remote Function Calls (RFC) between SAP systems, often during data migration or system integration processes.
  Cause:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  Destination Configuration: The RFC destination (identified as &2 in the error message) may not be configured correctly in the SAP system.
  System Load: The target system may be under heavy load, causing it to respond slowly or not at all.
  Firewall/Proxy Settings: Firewalls or proxy settings may be blocking the connection.
  Timeout Settings: The timeout settings for the RFC connection may be too low, causing the connection to time out before it can be established.
  
  Solution:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the source system can reach the target system.
  Ensure that there are no network outages or issues.
  
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination (&2) for correctness (e.g., hostname, system number, client, user credentials).
  Test the connection from SM59 to see if it is successful.
  
  
  
  Monitor System Load:
  
  Check the performance and load on the target system. If it is overloaded, consider scheduling the operation during off-peak hours.
  
  
  
  Review Firewall/Proxy Settings:
  
  Ensure that the necessary ports are open and that there are no firewall rules blocking the connection.
  If using a proxy, verify that it is configured correctly.
  
  
  
  Adjust Timeout Settings:
  
  In the RFC destination settings in SM59, you can adjust the timeout settings (e.g., "Connection Timeout" and "Response Timeout") to allow for longer connection attempts.
  
  
  
  Check SAP Notes:
  
  Look for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: For managing RFC destinations.
  SM21: For checking system logs for any related errors.
  ST22: For analyzing dumps that may provide more context on the issue.
  
  
  
  Documentation: Refer to SAP Help documentation for more details on RFC connections and troubleshooting.
  
  
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to diagnose and resolve the CNVMBTRFC133 error effectively.