How To Fix /IWFND/CM_CNP018 - Formatting GSDO type '&1' to WS interface has failed

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_CNP -

• Message number: 018

• Message text: Formatting GSDO type '&1' to WS interface has failed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_CNP018 - Formatting GSDO type '&1' to WS interface has failed ?

  The SAP error message /IWFND/CM_CNP018 Formatting GSDO type '&1' to WS interface has failed typically occurs in the context of SAP Gateway and OData services. This error indicates that there was a failure in formatting a Generic Service Data Object (GSDO) type to a Web Service (WS) interface. Here are some potential causes, solutions, and related information for this error:
  Causes:
  
  Data Type Mismatch: The GSDO type being formatted may not match the expected data type in the Web Service interface.
  Missing or Incorrect Mapping: There may be an issue with the mapping between the GSDO and the WS interface, such as missing fields or incorrect data types.
  Serialization Issues: Problems during the serialization process of the GSDO to the WS format can lead to this error.
  Configuration Issues: Incorrect configuration in the OData service or Gateway settings may lead to formatting failures.
  Version Compatibility: There may be compatibility issues between the versions of the SAP components involved.
  
  Solutions:
  
  Check Data Types: Verify that the GSDO type and the WS interface are compatible in terms of data types. Ensure that all fields are correctly defined.
  Review Mapping: Check the mapping configuration between the GSDO and the WS interface. Ensure that all required fields are mapped correctly.
  Debugging: Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and identify where the formatting is failing. Debugging the service can provide insights into the issue.
  Check Service Configuration: Review the OData service configuration in the SAP Gateway. Ensure that the service is properly activated and that all necessary settings are correct.
  Update Components: Ensure that all relevant SAP components are up to date. Sometimes, applying the latest patches can resolve compatibility issues.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  Related Information:
  
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it is crucial for developing and managing OData services.
  OData Services: Understanding how OData services work, including the concepts of entities, properties, and service definitions, can help in troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Refer to the official SAP documentation for OData services and SAP Gateway for detailed information on configuration and troubleshooting.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.