How To Fix OA229 - Error in HTTP protocol: &

SAP Error Message - Details

• Message type: E = Error

• Message class: OA - SAP ArchiveLink: Messages for SAP ArchiveLink

• Message number: 229

• Message text: Error in HTTP protocol: &

What causes this issue?

An error occurred during communication using the HTTP protocol.

System Response

&V1&

How to fix this error?

Inform your system administrator.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OA229 - Error in HTTP protocol: & ?

  The SAP error message OA229, which indicates "Error in HTTP protocol," typically arises when there is an issue with the HTTP communication between the SAP system and an external service or application. This error can occur in various scenarios, such as when using SAP Gateway, OData services, or when making HTTP calls from ABAP programs.
  Causes of OA229 Error
  
  
  Network Issues: Problems with the network connection, such as timeouts, DNS resolution failures, or firewall restrictions, can lead to this error.
  
  
  Incorrect URL: The URL being accessed may be incorrect or malformed, leading to an inability to establish a proper HTTP connection.
  
  
  Authentication Issues: If the external service requires authentication (e.g., Basic Auth, OAuth) and the credentials are missing or incorrect, the request may fail.
  
  
  Service Unavailability: The external service may be down or not reachable, resulting in an HTTP error.
  
  
  Proxy Configuration: If a proxy server is required for HTTP communication and is not configured correctly in the SAP system, it can lead to this error.
  
  
  SSL/TLS Issues: If the communication is over HTTPS and there are issues with SSL certificates (e.g., expired, untrusted), it can cause the HTTP protocol error.
  
  
  Solutions to OA229 Error
  
  
  Check Network Connectivity: Ensure that the SAP system can reach the external service. You can use tools like ping or telnet to test connectivity.
  
  
  Verify the URL: Double-check the URL being used in the HTTP request to ensure it is correct and properly formatted.
  
  
  Review Authentication Settings: If the external service requires authentication, verify that the correct credentials are being used and that they are properly configured in the SAP system.
  
  
  Check Service Status: Ensure that the external service is up and running. You can try accessing the service directly from a web browser or using tools like Postman.
  
  
  Proxy Configuration: If a proxy is needed, ensure that it is correctly configured in the SAP system. You can check the settings in transaction SMICM under the "HTTP" tab.
  
  
  SSL/TLS Configuration: If using HTTPS, check the SSL certificate configuration. Ensure that the certificate is valid and trusted by the SAP system. You may need to import the certificate into the SAP trust store.
  
  
  Review SAP Logs: Check the SAP application logs (transaction SLG1) and the ICM logs (transaction SMICM) for more detailed error messages that can provide additional context.
  
  
  Related Information
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to OA229.
  Transaction Codes: Familiarize yourself with transaction codes like SMICM (ICM Monitor), SLG1 (Application Log), and SICF (HTTP Service Hierarchy) for troubleshooting.
  Documentation: Review SAP documentation on HTTP communication and OData services for best practices and configuration guidelines.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.