/SDF/S1026 - Connection could not be established.

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/S1 -

• Message number: 026

• Message text: Connection 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.

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 /SDF/S1026 - Connection could not be established. ?

  The SAP error message /SDF/S1026 Connection could not be established typically indicates that there is an issue with establishing a connection to a service or system that is required for the SAP Fiori or SAP S/4HANA applications to function properly. This error can arise from various causes, and here are some common reasons along with potential solutions:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the service it is trying to connect to.
  Service Unavailability: The target service (like an OData service) may be down or not running.
  Configuration Errors: Incorrect configuration settings in the SAP system or the service endpoint.
  Firewall Restrictions: Firewalls may be blocking the connection to the required service.
  Authentication Issues: Problems with user credentials or authentication methods can prevent a successful connection.
  Incorrect URL: The URL used to connect to the service may be incorrect or outdated.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Ensure that the network connection is stable and that the SAP system can reach the target service. You can use tools like ping or traceroute to diagnose network issues.
  
  
  
  Verify Service Status:
  
  Check if the service you are trying to connect to is up and running. If it is an OData service, you can test it using a browser or a tool like Postman.
  
  
  
  Review Configuration Settings:
  
  Go through the configuration settings in the SAP system (like RFC destinations, HTTP connections, etc.) to ensure they are correct. Make sure the service endpoint is correctly defined.
  
  
  
  Check Firewall Settings:
  
  Ensure that any firewalls between the SAP system and the service are configured to allow traffic on the required ports.
  
  
  
  Validate Authentication:
  
  Check the user credentials being used for the connection. Ensure that the user has the necessary permissions to access the service.
  
  
  
  Correct the URL:
  
  Double-check the URL used for the connection. Make sure it is correct and points to the right service.
  
  
  
  Review Logs:
  
  Check the SAP application logs (transaction SLG1) and system logs (transaction SM21) for any additional error messages that might provide more context about the issue.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific service you are trying to connect to for any known issues or additional configuration steps.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Administrator: If you are unable to resolve the issue, consider reaching out to your system administrator or SAP support for further assistance.
  
  By following these steps, you should be able to diagnose and resolve the /SDF/S1026 Connection could not be established error in your SAP environment.