How To Fix /IWBEP/CM_CP030 - Serialization error: 'Edm.&1' with value '&2'

/IWBEP/CM_CP030 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 030

• Message text: Serialization error: 'Edm.&1' with value '&2'

Self-Explanatory Message

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/IWBEP/CM_CP030 - Details

• The SAP error message /IWBEP/CM_CP030 Serialization error: 'Edm.&1' with value '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a problem with serializing a specific data type (denoted by Edm.&1) into the OData response, where &2 represents the value that is causing the issue.
  Causes:
  
  Data Type Mismatch: The value being serialized does not match the expected data type defined in the OData model. For example, if the model expects a string but receives a number or a null value.
  Invalid Characters: The value may contain invalid characters that cannot be serialized properly, such as special characters or control characters.
  Null or Undefined Values: If the value is null or undefined and the OData model does not allow nulls for that property, it can lead to serialization errors.
  Incorrect Model Definition: The OData service might have an incorrect or incomplete definition of the entity type or