>my application1.exe call application2.exe by using RUN /N application2.exe
>it works fine in xp, but in vista an error shows application2.exe is not found.... why ?
>all of them are saved in same folder
See
Re: RUN command botching up SET PATH commands... Thread #
1168821 Message #
1169622
If it's not broken, fix it until it is.
My Blog 
