Problems with using fix colvars

Hi all,

I want to simulate a coalition of nanoparticles and include a harmonic
potential in distance between the centers mass of the nanoparticles
using the colvars package. But when I run following scrip appears this
error.

ERROR: Fix colvars requires an atom map (../fix_colvars.cpp:421)

Can you help me with this problem?

Please see below the imput and the colvars files for the run

Imput file is as follow...

Hi all,

I want to simulate a coalition of nanoparticles and include a harmonic
potential in distance between the centers mass of the nanoparticles
using the colvars package. But when I run following scrip appears this
error.

ERROR: Fix colvars requires an atom map (../fix_colvars.cpp:421)

Can you help me with this problem?

​you could have easily helped yourself by using google through searching
for:

​atom map site:lammps.sandia.gov

where the first hit already would point you to this web page:

​http://lammps.sandia.gov/doc/atom_modify.html
which provides the information you are looking for.

​axel.​