Object name not specified; see long description

What causes this issue?

The option for reusing an existing object was selected. However, the
name of this object was not specified.

System Response

The data flow generation cannot be executed.

How to fix this error?

Check your entries. The object name was probably not specified.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.