How To Fix /SMB/ATC_ERROR012 - RFC connection error: &1 &2 &3

SAP Error Message - Details

• Message type: E = Error

• Message class: /SMB/ATC_ERROR -

• Message number: 012

• Message text: RFC connection error: &1 &2 &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.

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SMB/ATC_ERROR012 - RFC connection error: &1 &2 &3 ?

  The SAP error message /SMB/ATC_ERROR012 indicates an RFC (Remote Function Call) connection error. This error typically arises when there is an issue with the connection between the SAP system and another system or service, such as an external application or another SAP instance.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Configuration Errors: The RFC destination may not be configured correctly in the SAP system.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  Service Availability: The target system or service may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the required ports for the RFC connection.
  Incorrect Parameters: The parameters used in the RFC call may be incorrect or not matching the expected format.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the target system is reachable from the SAP system.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI and check the configuration of the RFC destination. Ensure that the connection type, target host, and system number are correct.
  Test the connection from SM59 to see if it is successful.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  
  
  
  Check Target System Availability:
  
  Ensure that the target system is up and running. If it is down, you may need to wait until it is back online.
  
  
  
  Review Firewall Settings:
  
  Check if there are any firewall rules that might be blocking the connection. Ensure that the necessary ports are open.
  
  
  
  Review RFC Parameters:
  
  Double-check the parameters being passed in the RFC call to ensure they are correct and in the expected format.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC destinations.
  ST22: Dump analysis (to check for any ABAP runtime errors).
  SM21: System log (to check for any relevant log entries).
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections.
  
  
  Documentation: Review the SAP documentation for RFC connections and troubleshooting steps.
  
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.