Good morning!

I'm running GMX 4.5.4 using the sd integrator and I'm trying to couple only some of my T-couple groups to thermal reservoirs, i.e. I'd like to have at least one group for which tau_T=0. However, grompp gives me an error saying tau=0 is not acceptable with sd. I do not run into any such problems when using the vv-avek integrator with Nosé-Hoover thermostat.

Clearly, what I want is that for the group/s with tau_T=0, the integration would actually simplify to the md integrator. Can the code be altered to accept tau_T=0 for some T-couple groups while using the sd integrator (just as is accepted by the vv-avek integrator with the Nosé-Hoover thermostat)?

Thanks!

-- 
Inon Sharony
ינון   שרוני
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