Dossier non vide

set /A err=0
Set Dossier="C:\temp"
For /F %%I In (DIR %Dossier% /a:-d ^| find "File"') DO set /A wfile=%%i
if %wfile% GEQ 1 (
echo %wfile% OK
echo %wfile% file in %Dossier%
set err=%err%+%ERRORLEVEL%
) else (
echo %wfile% KO
echo file doesn't exist in %Dossier%
set err=%err%+0
)