How To Fix OL620 - Object type '&' has no subtypes

OL620 - Overview

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 620

• Message text: Object type '&' has no subtypes

What causes this issue?

You wish to delegate all requests directed to one object type to
another object type. This is only possible if the second object type is
a subtype of the original object type.
However, in this case the original object type does not have any
subtypes and no delegation can therefore be specified.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You should enter the object type to which requests are to be delegated
as a subtype of the original object type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL620 - Object type '&' has no subtypes ?

  The SAP error message OL620, which states "Object type '&' has no subtypes," typically occurs when you are trying to create or manipulate an object type in the SAP system that does not have any defined subtypes. This can happen in various contexts, such as when working with object-oriented programming in ABAP or when dealing with certain configuration settings in the SAP system.
  
  Cause:
  
  Object Type Definition: The object type you are trying to use does not have any subtypes defined in the system. In SAP, object types can have subtypes that inherit properties and behaviors from the parent type.
  Incorrect Object Type: You may be referencing an object type that is not intended to have subtypes, or you may have made a typographical error in the object type name.
  
  Configuration Issues: There may be issues in the configuration of the object types in the system, leading to the absence of expected subtypes.
  
  
  Solution:
  
  Check Object