How To Fix SK553 - Connection to & could not be established

SAP Error Message - Details

• Message type: E = Error

• Message class: SK - SAPcomm messages

• Message number: 553

• Message text: Connection to & could not be established

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 SK553 - Connection to & could not be established ?

  The SAP error message SK553, which states "Connection to & could not be established," typically indicates that there is an issue with establishing a connection to a specified system or service. This error can occur in various contexts, such as when trying to connect to a database, an external system, or a service within the SAP environment.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Incorrect Configuration: The connection parameters (like hostname, port, or service name) may be incorrectly configured in the SAP system.
  Service Unavailability: The target system or service may be down or not running.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection.
  Authentication Issues: There may be issues with user credentials or permissions required to establish the connection.
  SAP Gateway Issues: The SAP Gateway may not be functioning correctly, preventing connections.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the SAP system can reach the target system.
  Ensure that there are no network outages or issues.
  
  
  
  Verify Connection Parameters:
  
  Check the configuration settings in the SAP system (e.g., transaction codes like SM59 for RFC connections) to ensure that the hostname, port, and other parameters are correct.
  
  
  
  Check Target System Status:
  
  Ensure that the target system or service is up and running. If it is a database, check if the database service is active.
  
  
  
  Review Firewall Settings:
  
  Ensure that any firewalls between the SAP system and the target system allow traffic on the required ports.
  
  
  
  Check User Credentials:
  
  Verify that the user credentials used for the connection are correct and that the user has the necessary permissions.
  
  
  
  Review SAP Gateway Logs:
  
  Check the SAP Gateway logs for any errors or warnings that might provide more context about the connection issue.
  
  
  
  Test Connection:
  
  Use the connection test feature in transaction SM59 to test the connection and see if it provides any additional error messages.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or support notes related to the specific connection type you are trying to establish for any known issues or additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: For managing RFC connections.
  SICF: For managing HTTP services.
  ST22: For analyzing dumps that may provide more context on the error.
  
  
  
  SAP Notes: Check SAP Notes for any specific issues related to the error message SK553, as SAP frequently updates their knowledge base with solutions to common problems.
  
  
  Logs: Review system logs (transaction SM21) for any related error messages that might provide additional context.
  
  
  If the issue persists after following these steps, it may be necessary to engage with your SAP Basis team or SAP support for further assistance.