[gmx-users] switch

[Ilya Chorny]

I can't seem to stabilize my system using switch as my coulombtype in
conjunction with a Berendsen pressure coupling.

Coulombtype = switch
rcouloumb = 1.4
rcouloumb_switch = 1.2
tau_p = .5 - 3.0

If I change tau_p to 4.0 it works just fine but that seems like it's to
high of a number a causes large fluctuations in the pressure. My
temperature fluctuations are high as well (rmsd 50K).

Tau_t = .1

If I change it to coulombtype to shift or pme it works just fine. 

Any ideas?

Thanks

Ilya