rem one way to find the version of a file

for /f "tokens=2 delims= " %%G in ('type info.txt ^| findstr /B /C:"image"') do (
     IF "%%G"=="a" call a.bat
     IF "%%G"=="b" call b.bat
)


rem or like this
rem for /f "tokens=2 delims= " %%G in ('type info.txt ^| findstr /B /C:"image"') do call %%G.bat