\let\savedInputIfFileExists\InputIfFileExists
\documentclass[oneside, 12pt, a4paper, article]{memoir}
\let\InputIfFileExists\savedInputIfFileExists
\usepackage{scrlfile}
\makeatletter
\long\def\InputIfFileExists#1#2{%
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname #1-@alias\endcsname\relax
\expandafter\@secondoftwo
\else
\scr@replacefile@msg{\csname #1-@alias\endcsname}{#1}%
\expandafter\@firstoftwo
\fi
{%
\expandafter\InputIfFileExists\expandafter