Hi Ikegami , Yes that's the thing I am searching for. It should be something like this : when it moves with next ++ , it should check if IP is already assigned to any workstation ( May be checking DNS records - Dns is running on Windows 2003) . If so , It should skip it and move for other one... I am wondering , is it possible to check the DNS records someway?

In reply to Re^6: Automatic IP address Generation by ajd335
in thread Automatic IP address Generation by ajd335

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