Hi Axel
I was following this tutorial
https://sites.google.com/site/akohlmey/software/topotools/topotools-tutorial---part-1
the keywords I entered are
mol new chain.xyz autobonds no waitfor all
``
set sel [atomselect top all]
$sel set radius 0.85
``
any guidance
thanks
Milinda Samaraweera
University of Connecticut
Department of Chemistry
55 N Eagleville road
unit 3060
Storrs CT
USA