2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127976Usage of the Thomas-Ehrman Level Displacement formalism has been examined. Mistakes and inconsistencies are found in several papers, being repeated in subsequent works. Here, we present a complete formalism with a consistent set of definitions. Full algorithms are made available, both as a {\tt FORTRAN} source file and as a user-friendly Visual Basic executable tool, available for download on the World Wide Web.4 pages, 2 figures and 1 tableNuclear Theorytext