How To Fix WS_TOOL027 - Could not copy fields of type

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 027

• Message text: Could not copy fields of type

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS_TOOL027 - Could not copy fields of type ?

  SAP Error Message:
  WS_TOOL027 Could not copy fields of type
  
  
  Cause:
  This error typically occurs during Web Dynpro development or when working with Web Dynpro components, especially when trying to copy or map fields between structures or contexts. The message indicates that the system encountered a field type that it cannot handle or copy automatically.
  Common causes include:
  
  Attempting to copy fields of complex or unsupported data types (e.g., deep structures, table types, or reference types) that the Web Dynpro tool does not support copying directly.
  Incompatibility between source and target field types during mapping or copying.
  Using custom or unusual data types that the Web Dynpro framework cannot process automatically.
  Trying to copy fields that involve pointers, object references, or deep structures which require special handling.
  
  
  
  Solution:
  To resolve the WS_TOOL027 Could not copy fields of type error, consider the following steps:
  
  
  Check Field Types:
  
  Identify the fields causing the issue.
  Verify their data types in the ABAP Dictionary or in the