How To Fix /IWBEP/CM_CP012 - Wrong method call: 2 ADD_... methods of the same resource node

/IWBEP/CM_CP012 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 012

• Message text: Wrong method call: 2 ADD_... methods of the same resource node

Self-Explanatory Message

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/IWBEP/CM_CP012 - Details

• The SAP error message /IWBEP/CM_CP012 Wrong method call: 2 ADD_... methods of the same resource node typically occurs in the context of SAP Gateway and OData services. This error indicates that there are multiple ADD methods defined for the same resource node in your OData service, which is not allowed.
  
  Cause:
  
  Duplicate Method Definitions: The error arises when there are two or more ADD methods defined for the same entity type or resource node in your OData service implementation. This can happen if:
  The service definition has been incorrectly configured.
  There are multiple implementations of the same method in the service class.
  The service is trying to handle the same operation in different ways, leading to ambiguity.
  
  
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Service Definition:
  
  Go to the Service Builder (transaction code SEGW) and check the entity type and its associated methods.
  Ensure that there is only one ADD method defined for each resource node.
  
  
  
  Review