How To Fix /IWFND/CM_V4_RUNTIME007 - Complex collection not supported as return type

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_V4_RUNTIME -

• Message number: 007

• Message text: Complex collection not supported as return type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_V4_RUNTIME007 - Complex collection not supported as return type ?

  The SAP error message /IWFND/CM_V4_RUNTIME007 indicates that a complex collection is not supported as a return type in the context of an OData service. This error typically arises when the OData service is trying to return a collection of complex types, which is not allowed in certain scenarios.
  
  Cause:
  
  Complex Type Return: The OData service is attempting to return a collection of complex types instead of a collection of entity types. In OData, complex types cannot be returned as collections directly.
  Service Definition: The service definition may incorrectly specify the return type for an operation, leading to the expectation of a complex collection.
  Model Configuration: The data model may not be correctly configured to handle the expected return types.
  
  
  Solution:
  
  Change Return Type: Modify the return type of the OData service operation to return an entity type instead of a complex type. Ensure that the operation is designed to return a collection of entities.
  Use Entity Types: