>Hi
>In my job I have to use DOS applications with win2000.
>When I run this appl. I have error TOO MANY FILES OPEN.
>I insert string FILES=100 in config.sys, but do is not work.
>How I can fix it

Hi,
The filename for Win2000 (NT based) is config.nt not config.sys
Search in "\WinNT\System32" folder

HTH