2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/190723We analyze non-supersymmetric four dimensional open string models of type IIB string theory compactified on $T^2\times K3$ with Scherk-Schwarz deformation acting on an $S^1$ of the $T^2$ torus. We find that there are always two solutions to the tadpole conditions that are shown to be connected via Wilson lines in an non-trivial way. These models although non-supersymmetric, are free of R-R and NS-NS tadpoles.9 pages, no figues, Latex file (v2)High Energy Physics - Theorytext