DDIC object &1 does not exist or is not a structure

What causes this issue?

In class &V2& you need structure &V1& in order to fill additional
parameters. The structure &V1& is either not avaiable or it is not a
DDIC structure.

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

Error message extract from SAP system. Copyright SAP SE.