Fixed a bug that would not show any error message

backup.cmd

@@ -20,22 +20,22 @@ IF NOT ERRORLEVEL 0 (
   ECHO You need administrative permissions to run this script.
   EXIT /B 1
 )
-IF NOT EXIST %dism% >NUL 2>&1 (
+IF NOT EXIST %dism% (
   set dism=dism.exe
-  IF NOT EXIST %dism% >NUL 2>&1 (
+  IF NOT EXIST %dism% (
     ECHO Could not find DISM anywhere.
     EXIT /B 2
   )
 )
-IF NOT EXIST "%vshadow%" >NUL 2>&1 (
+IF NOT EXIST "%vshadow%" (
   ECHO Could not find vshadow.exe anywhere.
   EXIT /B 3
 )
 IF NOT DEFINED destdir (
   ECHO Please specify the destination path.
   EXIT /B 4
 )
-IF NOT EXIST "%destdir%" >NUL 2>&1 (
+IF NOT EXIST "%destdir%" (
   ECHO Destination path is not accessible.
   EXIT /B 5
 )
@@ -51,7 +51,7 @@ IF %srcpathonly:~-1%==\ (
   ECHO Path must not end with a backslash.
   EXIT /B 12
 )
-IF NOT EXIST "%sourcedir%" >NUL 2>&1 (
+IF NOT EXIST "%sourcedir%" (
   ECHO Source path is not accessible.
   EXIT /B 8
 )