How To Fix OL305 - Reference type '&' is not defined

OL305 - Overview

• Message type: E = Error

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

• Message number: 305

• Message text: Reference type '&' is not defined

What causes this issue?

Internal program error:
The function module 'SWC_CONT_EDIT_DEF' was called by another component
incorrectly parameterized.

How to fix this error?

Please report this error to SAP.

Error message extract from SAP system. Copyright SAP SE.

OL305 - Details

• The SAP error message OL305, which states "Reference type '&' is not defined," typically occurs in the context of ABAP programming or when working with data dictionary objects. This error indicates that the system is unable to find a reference type that has been specified in your code or configuration.
  Causes:
  
  Undefined Reference Type: The reference type specified in your code does not exist in the system. This could be due to a typo or because the type has not been created or activated.
  Missing Data Element or Structure: If you are trying to reference a data element or structure that has not been defined or is not active, you will encounter this error.
  Namespace Issues: If you are using a custom namespace and the reference type is not properly defined within that namespace, it may lead to this error.
  Transport Issues: If the reference type was recently transported from another system and the transport