How To Fix CNV_MBT_DEX057 - RFC communication error &2 (rfc system &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_DEX - DMIS Data Extract related messages

• Message number: 057

• Message text: RFC communication error &2 (rfc system &1)

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT_DEX057 - RFC communication error &2 (rfc system &1) ?

  The SAP error message CNV_MBT_DEX057 indicates an RFC (Remote Function Call) communication error between systems. This error typically occurs during data migration or when using the SAP Landscape Transformation (SLT) tool, and it can be caused by various issues related to network connectivity, configuration, or system settings.
  Causes:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  RFC Destination Configuration: The RFC destination may not be correctly configured in the SAP system. This includes incorrect parameters or missing entries in the transaction SM59.
  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 may be down or not reachable due to maintenance or other issues.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the systems.
  SAP Kernel or Version Mismatch: There may be compatibility issues between different SAP versions or kernel levels.
  
  Solutions:
  
  Check Network Connectivity: Ensure that both systems can communicate over the network. You can use tools like ping or telnet to test connectivity.
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination (both the source and target systems).
  Test the connection using the "Connection Test" option.
  
  
  Review Authorizations: Ensure that the user used for the RFC connection has the necessary authorizations to access the target system.
  Check System Status: Verify that the target system is up and running. You can check the system logs or use transaction SM51 to see the status of application servers.
  Firewall and Security Settings: Ensure that there are no firewall rules or security settings blocking the RFC communication.
  Update SAP Kernel: If there are known issues with the current kernel version, consider updating to a more recent version that may resolve compatibility issues.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SM21: To check system logs for errors.
  ST22: To check for dumps that may provide more context on the error.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP documentation related to RFC communication and data migration for best practices and configuration guidelines.
  
  If the issue persists after following these steps, it may be beneficial to engage SAP support for further assistance.