How To Fix /IWPGW/TGW_TCM_MSG012 - Serializing request entity '&1' failed

/IWPGW/TGW_TCM_MSG012 - Overview

• Message type: E = Error

• Message class: /IWPGW/TGW_TCM_MSG -

• Message number: 012

• Message text: Serializing request entity '&1' failed

Self-Explanatory Message

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/IWPGW/TGW_TCM_MSG012 - Details

• The SAP error message /IWPGW/TGW_TCM_MSG012 Serializing request entity '&1' failed typically occurs in the context of SAP Gateway services, particularly when there is an issue with the serialization of the request entity. This error can arise due to various reasons, including issues with the data being sent, problems with the service implementation, or configuration issues.
  Causes:
  
  Invalid Data Format: The data being sent in the request may not conform to the expected format or structure defined in the service.
  Serialization Issues: There may be issues with the serialization process itself, which could be due to custom data types or complex structures that are not being handled correctly.
  Service Implementation Errors: If the OData service is not implemented correctly, it may lead to serialization failures.
  Missing or Incorrect Annotations: If the OData model is missing necessary annotations or has incorrect definitions, it can lead to serialization issues.
  Data Type Mismatches: Mismatches between the expected data types in