Hi,
Actually I think that although the .atp file seems to be used, the masses in the ffamberxxnb.itp file must be changed from the zero values to the correct ones: when I ran a simulation without changing them I got infinite velocities and which did nor happen when I changed the masses to the correct ones.
    Thanks,
George

David van der Spoel wrote:

Maik Goette wrote:

David

I think, I should not contradict to one of the developers, but if your statement is true: 1. Where, in fact, are the masses coming from (the masses in the amberFF port can only be found in the atp, as far as I know)? 2. Why does GROMACS complain about missing atoms in the atp-file, if I add a new atom type to the nb-section?

Just out of curiosity...

Hm, no problems contradicting me at least... I presume you're right.


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