How To Fix /IWBEP/CM_MGW_RT157 - Type of data container returned by DPC is wrong. '&1' is expected

/IWBEP/CM_MGW_RT157 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 157

• Message text: Type of data container returned by DPC is wrong. '&1' is expected

Self-Explanatory Message

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/IWBEP/CM_MGW_RT157 - Details

• The SAP error message /IWBEP/CM_MGW_RT157 indicates that there is a mismatch in the type of data container returned by the Data Provider Class (DPC) in an OData service. Specifically, the error message states that the expected type of data container is different from what is being returned.
  
  Cause:
  
  Mismatch in Data Types: The DPC is expected to return a specific type of data container (e.g., a structure, entity type, or collection), but it is returning a different type.
  Incorrect Implementation: The implementation of the DPC methods (like GET_ENTITY, GET_ENTITYSET, etc.) may not be returning the correct data structure as defined in the service metadata.
  Service Metadata Issues: The OData service metadata might not be correctly defined, leading to discrepancies between what is expected and what is returned.
  Changes in Data Model: If there have been recent changes to the underlying data model or the OData service definition, the DPC might not have been updated accordingly.
  
  
  Solution:
  
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