How To Fix CMES106 - External system has reported the exception "External error"

SAP Error Message - Details

• Message type: E = Error

• Message class: CMES - External Scheduling Interface CS-SDL

• Message number: 106

• Message text: External system has reported the exception "External error"

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 CMES106 - External system has reported the exception "External error" ?

  The SAP error message CMES106, which states "External system has reported the exception 'External error'," typically indicates that there is an issue with communication between SAP and an external system. This error can arise in various contexts, such as when integrating with third-party applications, web services, or other SAP systems.
  Causes:
  
  Network Issues: There may be connectivity problems between the SAP system and the external system, such as network outages or firewall restrictions.
  Configuration Errors: Incorrect configuration settings in either the SAP system or the external system can lead to communication failures.
  Data Format Issues: The data being sent or received may not be in the expected format, leading to parsing errors.
  Timeouts: The external system may be taking too long to respond, resulting in a timeout error.
  Authentication Issues: Problems with user credentials or tokens required for accessing the external system can also trigger this error.
  External System Errors: The external system itself may be experiencing issues, such as being down or encountering its own internal errors.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can reach the external system. Use tools like ping or traceroute to diagnose network issues.
  Review Configuration Settings: Verify that all configuration settings in both SAP and the external system are correct. This includes URLs, ports, and any required parameters.
  Validate Data Formats: Ensure that the data being exchanged is in the correct format and adheres to the expected schema.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings in the SAP system or the external system.
  Check Authentication: Verify that the credentials used for accessing the external system are correct and have not expired.
  Monitor External System: Check the status of the external system to ensure it is operational. Look for any logs or error messages that might indicate issues on that side.
  Consult Documentation: Review the documentation for both SAP and the external system for any specific requirements or known issues.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Logs and Traces: Review the application logs in SAP (transaction SLG1) and any logs available in the external system to gather more context about the error.
  Integration Tools: If using middleware (like SAP PI/PO, SAP CPI, etc.), check the logs and configurations in those tools as well.
  Support: If the issue persists, consider reaching out to SAP support or the support team for the external system for further assistance.
  
  By systematically addressing these areas, you should be able to identify and resolve the underlying cause of the CMES106 error.