How To Fix DT185 - Field &: User type & is generated proxy type, therefore not usable

DT185 - Overview

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 185

• Message text: Field &: User type & is generated proxy type, therefore not usable

What causes this issue?

You are using a type (data element, structure, table type) that is a
generated proxy type in a structure that does not represent a generated
proxy type or is contained in a database table.
Usage of such types should only be possible, however, if the user
itself is a generated proxy type.
Generated proxy types can be data elements, structures, and table
types.

System Response

This object will not be activated.

How to fix this error?

Replace the used generated proxy type with a suitable type without this
property.

Error message extract from SAP system. Copyright SAP SE.

DT185 - Details

• The SAP error message DT185 indicates that there is an issue with the data type being used in a proxy interface. Specifically, it states that the user type being referenced is a generated proxy type, which means it cannot be used in the context where it is being referenced.
  
  Cause:
  
  Generated Proxy Type: The error typically occurs when a generated proxy type (like a web service proxy) is being used in a context that expects a different type of data structure. This can happen if the proxy type is not properly defined or if there is a mismatch in the expected data types.
  Incorrect Mapping: If you are working with mappings in an integration scenario (like PI/PO), the mapping might be incorrectly set up to use a generated proxy type instead of a compatible type.
  Version Mismatch: There may be a version mismatch between the service definition and the proxy generated in the SAP