How To Fix /IWBEP/CM_CP125 - Internal type missing for parameter '&1' in operation '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 125

• Message text: Internal type missing for parameter '&1' in operation '&2'

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_CP125 - Internal type missing for parameter '&1' in operation '&2' ?

  The SAP error message /IWBEP/CM_CP125 Internal type missing for parameter '&1' in operation '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a missing internal type definition for a parameter in a specific operation of an OData service.
  Cause:
  
  Missing Type Definition: The error usually arises when the OData service is trying to process a parameter for which there is no corresponding internal type defined in the service's metadata.
  Incorrect Data Model: If the data model used in the OData service is not correctly defined or if there are inconsistencies in the data types, this error can occur.
  Service Implementation Issues: If the service implementation does not properly define the expected parameters and their types, it can lead to this error.
  
  Solution:
  
  Check Metadata: Review the metadata of the OData service to ensure that all parameters and their types are correctly defined. You can access the metadata by appending $metadata to the service URL.
  Define Missing Types: If you identify any missing types in the metadata, you will need to define them in the service implementation. This may involve updating the data model or the service definition in the SAP Gateway.
  Regenerate Service: If changes are made to the data model or service definition, regenerate the OData service. This can be done using transaction code /IWFND/MAINT_SERVICE to maintain the service and then using /IWBEP/REG_SERVICE to register it again.
  Check Service Implementation: Ensure that the service implementation (e.g., the methods in the DPC class) correctly handles the parameters and that the types are consistent with the definitions in the metadata.
  Debugging: If the issue persists, consider debugging the service to trace where the error occurs. This can help identify if the issue is with the data being passed or with the service logic itself.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /IWFND/MAINT_SERVICE for service maintenance and /IWBEP/REG_SERVICE for service registration.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific version of SAP Gateway you are using.
  Documentation: Review SAP documentation on OData services and SAP Gateway to understand the expected structure and types for parameters.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly.