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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE148 - No valid interface, &1 does not exist ?

  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 issues in the form or the associated settings that prevent the interface from being recognized.
  
  
  Solution:
  
  
  Check Interface Existence:
  
  Go to transaction SE80 (Object Navigator) or SE37 (Function Module) and check if the interface exists.
  If it does not exist, you may need to create it or restore it from a backup.
  
  
  
  Correct References:
  
  Ensure that the form or document is correctly referencing the interface. Check for any typos or incorrect naming conventions.
  
  
  
  Transport Validation:
  
  If the interface was supposed to be transported, check the transport logs for any errors. Ensure that the transport request was successfully imported into the target system.
  
  
  
  Authorization Check:
  
  Verify that the user has the necessary authorizations to access the interface. You may need to consult with your security team to ensure proper roles and permissions are assigned.
  
  
  
  Re-activate the Interface:
  
  If the interface exists but is not active, try reactivating it. Sometimes, reactivation can resolve issues related to inconsistencies.
  
  
  
  Check Configuration:
  
  Review the configuration settings related to the form and interface. Ensure that all necessary settings are correctly configured.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. You can search for the error message or related keywords in the SAP Support Portal.
  Documentation: Review the official SAP documentation for Adobe Forms or the specific module you are working with to ensure that all prerequisites and configurations are met.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.