How To Fix X4_REST_CALL009 - Communication Failure while calling X4: &1 and &2

SAP Error Message - Details

• Message type: E = Error

• Message class: X4_REST_CALL - Messages of X4 Rest Call Handler

• Message number: 009

• Message text: Communication Failure while calling X4: &1 and &2

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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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message X4_REST_CALL009 - Communication Failure while calling X4: &1 and &2 ?

  The SAP error message X4_REST_CALL009 indicates a communication failure when attempting to call a REST service. This error typically occurs in scenarios where SAP is trying to interact with an external system or service via RESTful APIs. The message provides placeholders for the specific service being called, represented by &1 and &2.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the external service.
  Service Unavailability: The external REST service may be down or not reachable.
  Incorrect URL: The URL used to call the REST service may be incorrect or malformed.
  Authentication Issues: If the REST service requires authentication, incorrect credentials or tokens may lead to a failure.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between SAP and the external service.
  Timeouts: The request may be timing out due to slow response times from the external service.
  Configuration Errors: There may be misconfigurations in the SAP system related to the REST service settings.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can reach the external service. You can use tools like ping or curl to test connectivity.
  Verify Service Status: Check if the external REST service is up and running. You can do this by accessing the service directly through a web browser or a tool like Postman.
  Review the URL: Double-check the URL being used in the REST call for correctness.
  Authentication: Ensure that the correct authentication method is being used and that the credentials or tokens are valid.
  Firewall Settings: Review firewall settings to ensure that they allow traffic between the SAP system and the external service.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the SAP system for the REST call.
  Check SAP Configuration: Review the configuration settings in SAP related to the REST service, including any relevant parameters or settings in transaction codes like SOAMANAGER.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to REST communication.
  Logs and Traces: Review application logs and traces in SAP (e.g., using transaction SLG1) to gather more details about the error.
  Documentation: Refer to the official SAP documentation for guidelines on configuring and troubleshooting REST services.
  Community Forums: Engage with SAP community forums or support channels for additional insights and assistance from other users who may have encountered similar issues.
  
  By systematically addressing these potential causes and implementing the suggested solutions, you should be able to resolve the communication failure indicated by the error message X4_REST_CALL009.