When configuring a build using the base ClearCase Plugin and an existing dynamic view, Hudson asks for the dynamic view tag and the view root path.
It concatenates both strings to obtain the clearcase view path.

It is inaccurate when view path have a trailing extension.
For example, our view path are : <view_root>/<view_tag>.vws

Moreover, the best way to obtain a complete view path is to use :
ct lsview <view tag>
So, the view root input field is probably useless.