How To Fix SK552 - Communication error: &

SAP Error Message - Details

• Message type: E = Error

• Message class: SK - SAPcomm messages

• Message number: 552

• Message text: Communication error: &

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 SK552 - Communication error: & ?

  The SAP error message SK552, which indicates a "Communication error," typically arises in scenarios involving communication between SAP systems or between an SAP system and external systems. The error message may include additional details, such as the specific communication method or the component involved.
  Causes:
  
  Network Issues: Problems with the network connection, such as downtime, misconfigured firewalls, or routing issues.
  Configuration Errors: Incorrect settings in the SAP system configuration, such as RFC destinations, logical system settings, or communication parameters.
  System Availability: The target system may be down or not reachable due to maintenance or other issues.
  Authorization Issues: The user or service account may not have the necessary permissions to perform the communication.
  Protocol Mismatch: Incompatibility between the communication protocols used by the systems (e.g., HTTP, RFC).
  Timeouts: Long response times from the target system can lead to timeouts and communication errors.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the systems is stable and that there are no firewall rules blocking the communication.
  Verify Configuration: Review the configuration settings for RFC destinations, logical systems, and communication parameters in transaction SM59 (for RFC connections).
  System Status: Check the status of the target system to ensure it is up and running. You can use transaction SM51 to view active instances.
  Authorization Checks: Ensure that the user or service account has the necessary authorizations to perform the communication.
  Review Logs: Check the system logs (transaction SM21) and application logs (transaction SLG1) for more detailed error messages that can provide insights into the issue.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings in the relevant configuration.
  Test Communication: Use the Test Connection feature in transaction SM59 to verify that the RFC connection is working correctly.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  SLG1: Application Log
  SM51: List of Active Instances
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to the SK552 error.
  Documentation: Review SAP documentation for troubleshooting communication errors and best practices for configuring RFC connections.
  
  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.