How To Fix /IWFND/CM_RS004 - Wrong external-ID type

/IWFND/CM_RS004 - Overview

• Message type: E = Error

• Message class: /IWFND/CM_RS -

• Message number: 004

• Message text: Wrong external-ID type

Self-Explanatory Message

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/IWFND/CM_RS004 - Details

• The SAP error message /IWFND/CM_RS004 Wrong external-ID type typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a mismatch in the expected type of the external ID being used in a request. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  Mismatched Data Types: The external ID being sent in the request does not match the expected data type defined in the OData service. For example, if the service expects a numeric ID but receives a string, this error can occur.
  Incorrect Mapping: The mapping of the external ID in the OData service might not be correctly defined, leading to type mismatches.
  Service 
  Configuration Issues: There may be issues in the configuration of the OData service or the underlying data model that lead to this error.
  Client-Side Issues: The client application making the request may be sending the wrong type of data for the