Re: excpetion

[Jean-Noël Grad]

Hi Marcos,

To add a bond between two particles, you need to first register the bond 
parameters in the espresso system:

from espressomd.interactions import HarmonicBond
harmonic_bond = HarmonicBond(k=1, r_0=1, r_cut=5)
system.bonded_inter.add(harmonic_bond)
system.part[1].add_bond((harmonic_bond, 2))

Best regards,
JN

On 11/1/19 4:06 PM, marcos nolasco wrote:
> i'm buildin a model that needs harmonic bonds between its components, 
> but when i run the code, expresso shows me the following sentence:
>
> /"File "particle_data.pyx", line 1514, in 
> espressomd.particle_data.ParticleHandle.add_bond/
> /  File "particle_data.pyx", line 1448, in 
> espressomd.particle_data.ParticleHandle.check_bond_or_throw_exception
> Exception: The bonded interaction has not yet been added to the list of 
> active bonds in Espresso"/
> /
> /
> so, i'd like to know, is this list of active bonds the same in myconfig? 
> how can i solve this? thanks!