Hi list,

Good evening to all of you. Once again I need to ask you about 
something related to the forcefields and in particular MMFF94.

I looked at the validation for the MMFF94 OpenBabel implementation that 
Tim uploaded at 
http://home.scarlet.be/timvdm/MMFF94_validation_output.gz

I found the dataset he used for that validation is different from the 
forcefields.sdf dataset that is currently used in the MMFF94 nightly 
build validation. So I went on to fetch the molecules directly from 
CCL.NET  (http://www.ccl.net/cca/data/MMFF94)  The problem is that there 
I found two slightly different datasets: MMFF94_dative.mol2 and 
MMFF94_hypervalent.mol2 . Which one of them is the one I should be 
using?

I guess I am not using the appropriate one because when running 
obminimize against any of those I can't get any output:

$ obminimize -ff mmff94 MMFF94_hypervalent.mol2
$ obminimize -ff mmff94 MMFF94_dative.mol2

Reason why I am asking you this, is because although the dataset in 
forcefield.sdf is good for validation, I will like to build a larger 
dataset for profiling purposes.  A preliminar analysis of the profiling 
tool(I am using OProfile) is showing that the most intensive computation 
is occurring inside forcefield.cpp rather than forcefieldmmff94.cpp 
which is contrary to what I was initially expecting.

Have a good weekend,
--
Omar Valerio M.

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