2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/23065We correct a previously erroneous calculation [Phys. Rev. E 62, 6065 (2000)] of the mean first passage time of a subdiffusive process to reach either end of a finite interval in one dimension. The mean first passage time is in fact infinite.To appear in Phys. Rev. EStatistical Mechanicstext