How To Fix CNV_DMC_MD_EXTRACTOR027 - Web Service not supported because of reference parameters

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MD_EXTRACTOR - meta data extractor message class

• Message number: 027

• Message text: Web Service not supported because of reference parameters

What causes this issue?

You tried to create a receiver container based on a web service which
contains a reference in at least one parameter.

System Response

The use of web services which contain one or more parameters having a
reference is currently not supported.

How to fix this error?

Use another function module or try to wrap the web service you use in
another web service which does no longer contain any parameter having a
reference.

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 CNV_DMC_MD_EXTRACTOR027 - Web Service not supported because of reference parameters ?

  The SAP error message CNV_DMC_MD_EXTRACTOR027 indicates that a web service is not supported due to the presence of reference parameters. This error typically arises in the context of data migration or data extraction processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools.
  Cause:
  The error occurs because the web service being called includes reference parameters, which are not supported in the context of the operation being performed. Reference parameters are parameters that allow a function to modify the value of the variable passed to it, and they can complicate the web service's ability to process requests correctly.
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review the Web Service Definition: Check the web service definition to identify any reference parameters. If possible, modify the web service to eliminate reference parameters or replace them with value parameters.
  
  
  Use Alternative Methods: If the web service cannot be modified, look for alternative methods or services that do not use reference parameters. This may involve using different APIs or function modules that are compatible with your requirements.
  
  
  Check SAP Notes: Search for relevant SAP Notes or documentation that may provide additional insights or updates regarding this error. SAP frequently releases updates and patches that may address known issues.
  
  
  Consult SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They may provide specific guidance based on your system configuration and the version of SAP you are using.
  
  
  Testing: After making changes, thoroughly test the web service to ensure that it functions correctly without the reference parameters and that the data migration or extraction process completes successfully.
  
  
  Related Information:
  
  SAP Data Migration Cockpit (DMC): This tool is used for data migration in SAP S/4HANA and other SAP systems. Understanding its architecture and limitations can help in troubleshooting issues like this.
  Web Services in SAP: Familiarize yourself with how web services are defined and consumed in SAP, including the differences between reference and value parameters.
  SAP Community and Forums: Engaging with the SAP Community can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to address the CNV_DMC_MD_EXTRACTOR027 error and proceed with your data migration or extraction tasks.