How To Fix CACSOA121 - Error during registration of generated user interface

CACSOA121 - Overview

• Message type: E = Error

• Message class: CACSOA - FOA: Messages Related to Object Assignments

• Message number: 121

• Message text: Error during registration of generated user interface

What causes this issue?

An error has occurred while attempting to register the generated user
interface &V1& for the interface definition of the assignment type for
structure &V2&, usage type &V3& and field selection &V4&. Either the
configuration of interface definition of the assignment type could not
be updated or the configuration change could not be transferred to a
transport request.

System Response

Processing of the user interface generation is terminated without an
update of the configuration of the interface definition of the
assignment type. Under these circumstances it is only possible to create
a worklist for this assignment type for an optional interface element
(object search or target object search).

How to fix this error?

Enter the name of the generated user interface (&V1&) manually for the
required interface definition of the assignment type.
Contact your system administration for an analysis and solution of the
problem.

Error message extract from SAP system. Copyright SAP SE.

CACSOA121 - Details

• The SAP error message CACSOA121 indicates that there was an error during the registration of a generated user interface (UI). This error typically occurs in the context of SAP's Composite Application Framework (CAF) or when working with SAP's Service-Oriented Architecture (SOA) applications.
  Causes:
  
  
  Configuration Issues: There may be misconfigurations in the service or application settings that prevent the UI from being registered correctly.
  Missing Dependencies: Required components or dependencies for the UI might be missing or not properly installed.
  Authorization Problems: The user attempting to register the UI may not have the necessary authorizations or roles assigned.
  Technical Errors: There could be underlying technical issues, such as problems with the database, network issues, or server errors.
  Version Compatibility: The version of the UI or the underlying components may not be compatible with the SAP system version.
  
  Solutions:
  
  Check Configuration: Review the configuration settings for the UI and ensure that all parameters are correctly set.
  Verify Dependencies: Ensure that all