How To Fix INV120 - Define a display function for reference type &1

INV120 - Overview

• Message type: E = Error

• Message class: INV - Check for Bill Receipt

• Message number: 120

• Message text: Define a display function for reference type &1

What causes this issue?

You cannot display a reference for a bill document because the defintion
of the function module used to display the reference is missing.

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?

Procedure for System Administrators

In Customizing, define a function module to display reference type &1.
INCLUDE ISU_PENCIL OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.

INV120 - Details

• The SAP error message INV120, which states "Define a display function for reference type &1," typically occurs in the context of the SAP system when there is an issue related to the display function for a reference type in the system. This error is often encountered in the context of the SAP Investment Management (IM) module or when dealing with specific reference types in the system.
  
  Cause:
  The error is usually caused by one of the following reasons:
  
  Missing Configuration: The display function for the specified reference type has not been defined in the system. This can happen if the reference type is newly created or if the configuration was not completed properly.
  Custom Development: If there are custom developments or enhancements in the system, they may not have included the necessary display functions for certain reference types.
  Transport Issues: If the configuration was transported from one system to another (e.g., from development to production),