How To Fix /IWBEP/CM_CP164 - HTTP Client Factory: Data ref. attributes are not supported (see '&1')

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 164

• Message text: HTTP Client Factory: Data ref. attributes are not supported (see '&1')

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_CP164 - HTTP Client Factory: Data ref. attributes are not supported (see '&1') ?

  The SAP error message /IWBEP/CM_CP164 indicates that there is an issue with the HTTP Client Factory in the context of SAP Gateway or OData services. Specifically, the message states that "Data ref. attributes are not supported," which typically means that there is a problem with the way data references (or data types) are defined or used in your OData service.
  Cause:
  
  
  Unsupported Data Types: The error often arises when the OData service is trying to use data reference attributes that are not supported by the HTTP Client Factory. This can happen if the data model includes complex types or associations that are not properly defined or are incompatible with the OData protocol.
  
  
  Incorrect Metadata: If the metadata of the OData service is not correctly defined, it may lead to this error. This includes issues with entity types, navigation properties, or data types that are not recognized.
  
  
  Version Mismatch: There may be a version mismatch between the SAP Gateway and the backend system, leading to incompatibilities in how data references are handled.
  
  
  Solution:
  
  
  Check Data Model: Review the data model of your OData service. Ensure that all entity types, complex types, and associations are correctly defined and supported by the OData protocol.
  
  
  Update Metadata: Regenerate the metadata for your OData service. You can do this by using transaction code /IWFND/MAINT_SERVICE to maintain your OData service and regenerate the metadata.
  
  
  Review Service Implementation: Check the implementation of your OData service. Ensure that the data references are being used correctly and that any complex types are properly handled.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and patches. Sometimes, issues like these are resolved in newer versions.
  
  
  Consult Documentation: Refer to the SAP Help Portal or the specific documentation for your version of SAP Gateway to understand the limitations and supported features regarding data references.
  
  
  Debugging: If the issue persists, consider debugging the OData service to trace where the error occurs. This can provide insights into which specific data reference is causing the problem.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to OData services and the specific error message for any known issues or fixes.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /IWFND/MAINT_SERVICE for service maintenance and /IWBEP/REG_SERVICE for registering services.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.