Berk Hess a écrit :

That good news.

While looking at the code again just now,
I realized what the actual problem is.
The check before and after the box correction are both done with BOX_MARGIN,
which can lead to the problem you observed when the last bit of the box
is rounded in an unlucky fashion. So even with your change the problem could 
still occur.
A real fix is adding a factor 2 (2*) in front of BOX_MARGIN in src/gmxlib/pbc.c.
I have added this fix for the 3.3.3 release.

Berk.

Is the fix committed already, i cannot get it from the current cvs repository?

Cheers,
Stéphane

--
Stéphane Téletchéa, PhD.                  http://www.steletch.org
Unité Mathématique Informatique et Génome http://migale.jouy.inra.fr/mig
INRA, Domaine de Vilvert                  Tél : (33) 134 652 891
78352 Jouy-en-Josas cedex, France         Fax : (33) 134 652 901
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