How To Fix 1R546 - Unexpected error while reading from HTTP server

SAP Error Message - Details

• Message type: E = Error

• Message class: 1R - SAP Knowledge Provider

• Message number: 546

• Message text: Unexpected error while reading from HTTP server

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 1R546 - Unexpected error while reading from HTTP server ?

  The SAP error message 1R546: Unexpected error while reading from HTTP server typically indicates that there is an issue with the communication between the SAP system and an external HTTP server. This can occur in various scenarios, such as when the SAP system is trying to access a web service, an API, or any other HTTP-based resource.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the HTTP server.
  Server Unavailability: The HTTP server may be down or not reachable.
  Timeouts: The request may be timing out due to slow response times from the server.
  Configuration Issues: Incorrect configuration settings in the SAP system or the HTTP server can lead to communication failures.
  Authentication Problems: If the HTTP server requires authentication, and the credentials are incorrect or missing, this error may occur.
  Firewall or Security Settings: Firewalls or security settings may be blocking the connection to the HTTP server.
  Data Format Issues: The data being sent or received may not be in the expected format, leading to parsing errors.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can reach the HTTP server. You can use tools like ping or telnet to test connectivity.
  Verify Server Status: Check if the HTTP server is up and running. You can try accessing the server directly through a web browser or a tool like Postman.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the SAP system for HTTP requests.
  Review Configuration: Double-check the configuration settings in the SAP system related to the HTTP connection (e.g., HTTP destination settings in transaction SM59).
  Check Authentication: Ensure that the correct authentication method and credentials are being used to access the HTTP server.
  Inspect Firewall Settings: Review firewall rules and security settings to ensure that they are not blocking the connection.
  Analyze Logs: Check the SAP application logs (transaction SLG1) and the HTTP server logs for any additional error messages or clues.
  Test with Different Tools: Use tools like Postman or curl to test the HTTP request independently of SAP to see if the issue persists.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review the SAP documentation for the specific module or functionality you are using to see if there are any specific requirements or configurations needed for HTTP communication.
  Community Forums: Look for discussions in SAP Community or other forums where similar issues may have been reported and resolved.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.