[gmx-users] H-bonds

[Carla Jamous]

Hi,

please I'm trying to measure an hbond between 2 specific atoms. When I used
g_hbond I didn't the result I expected because it doesn't specify the atoms
that constitute the H bond.
Now I'm trying with g_dist but I encountered a problem: when I do the
following in my index file:

r 172 & a HD2

it tells me: empty group

So please can anyone help me?

Thank you.
Carla
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