From: Axel Kohlmeyer (
Date: Fri Mar 22 2013 - 09:35:19 CDT

On Fri, Mar 22, 2013 at 2:36 PM, Ivan Moncayo <> wrote:
> Hi to all,
> I was trying read a lammps data file, but when I used topo readlammpsdata, I
> have the next error: can't use non-numeric string as operand of "+". I
> don't have '+' in my data file , so thanks for your advices

please make sure that your topotools version is the latest version from here:
or try out a recent VMD alpha test build.

if the problem persists, please make your data file available, so i
can debug what is going on.

> --
> Saludos
> Iván Moncayo R.

Dr. Axel Kohlmeyer
International Centre for Theoretical Physics, Trieste. Italy.