How To Fix SNC017 - Invalid external ID length (&1) passed

SAP Error Message - Details

• Message type: E = Error

• Message class: SNC - Secure Network Communication, SNC

• Message number: 017

• Message text: Invalid external ID length (&1) passed

What causes this issue?

The transferred length &V1& of the external identification is either
less than one or greater than the maximum permitted length.

System Response

The logon is terminated.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SNC017 - Invalid external ID length (&1) passed ?

  The SAP error message SNC017: Invalid external ID length (&1) passed typically occurs in the context of Secure Network Communications (SNC) when there is an issue with the length of the external ID being used for authentication or identification purposes. This error indicates that the length of the external ID provided does not meet the expected criteria defined by the SNC configuration.
  Cause:
  
  Invalid Length: The external ID being passed is either too short or too long. Each SNC implementation has specific requirements for the length of external IDs.
  Configuration Issues: There may be a misconfiguration in the SNC settings, such as incorrect parameters in the SNC profile or settings in the SAP system.
  Data Entry Errors: The external ID may have been incorrectly entered or formatted, leading to an invalid length.
  Compatibility Issues: The external ID may not be compatible with the SNC library or the version of the SAP system being used.
  
  Solution:
  
  Check External ID Length: Verify the length of the external ID being used. Ensure it adheres to the expected length defined in the SNC configuration. Typically, the valid length is specified in the SNC documentation or configuration settings.
  Review SNC Configuration: Check the SNC configuration in the SAP system. Ensure that all parameters related to external IDs are correctly set up. This includes reviewing the SNC profile and any related settings.
  Correct Data Entry: If the external ID was manually entered, double-check for any typographical errors or formatting issues. Ensure that it is correctly formatted and within the valid length.
  Consult Documentation: Refer to the SAP documentation for SNC to understand the specific requirements for external IDs and any limitations that may apply.
  Update SNC Library: If you are using an external SNC library, ensure that it is up to date and compatible with your version of SAP.
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide insights specific to your system configuration.
  
  Related Information:
  
  SNC Documentation: Review the official SAP documentation on Secure Network Communications for detailed information on configuration and requirements.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Logs: Analyze system logs for any additional error messages or warnings that may provide context for the SNC017 error.
  
  By following these steps, you should be able to identify the cause of the SNC017 error and implement a solution to resolve it.