2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45634We discuss the domain wall problem in the Next-to-Minimal Supersymmetric Standard Model, with particular attention to the usual solution of explicit breaking of the discrete symmetry by non-renormalisable operators. This ``solution'' leads to a contradiction between the requirements of cosmology and those of avoiding the destabilisation of the hierarchy.6 pages LaTeX, needs sprocl.sty (included at end) Talk presented by P.L. White at Valencia 95High Energy Physics - Phenomenologytext