How To Fix FDT_CORE148 - No valid interface, &1 does not exist

FDT_CORE148 - Overview

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 148

• Message text: No valid interface, &1 does not exist

What causes this issue?

The signature of an BRFplus expression type is defined by an ABAP-OO
interface. The functionality is defined in an ABAP-OO class implementing
that interface. This class also needs to implement the interface
IF_FDT_EXPRESSION.
Optionally there can be further classes defined for an expression type.
These are a query class, a UI class and a data exchange class. For a
detailed description of the functionality provided by these classes,
refer to the BRFplus documentation. If one of the classes is set it
needs to implement a corresponding interface.
These are the following:
The query class needs to implement IF_FDT_OBJECT_QUERY
The UI class needs to implement IF_FDT_UI_DEFINITION
The data exchange class needs to implement IF_FDT_DATA_EXCHANGE_EXTERNAL

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?

Specify a correct interface and correct classes for the expression type.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

FDT_CORE148 - Details

• The SAP error message FDT_CORE148: No valid interface, &1 does not exist typically occurs in the context of SAP Forms and Document Management, particularly when working with Adobe Forms or other form-related functionalities. This error indicates that the system is unable to find a valid interface for the specified object or form.
  
  Cause:
  
  
  Missing Interface: The specified interface (denoted by &1 in the error message) does not exist in the system. This could be due to a number of reasons, such as:
  
  The interface was never created.
  The interface was deleted or not properly activated.
  There is a typo in the interface name or it is incorrectly referenced in the form.
  
  
  
  Transport Issues: If the interface was transported from another system, there may have been issues during the transport process that caused the interface not to be available.
  
  
  Authorization Issues: The user may not have the necessary authorizations to access the interface.
  
  
  
  Configuration Issues: There may be configuration