> Hi Paul,
>
> On Mon, Nov 12, 2012 at 8:50 AM,  <[email protected]> wrote:
> >
> >
> > In [7]: m = Chem.MolFromSmiles('c1ccccc1OC')
> >         ds = calc.CalcDescriptors(m)
> >         len(ds)
> >
> > Out[7]: 93
> >
> > In [8]: print rdBase.rdkitVersion
> >         2012.09.1beta
> >
> >
> > Now you see that we are still using the Q3 beta :)
> >
> > Only solution: Upgrading to the stable version? Or is there a
workaround
> > available in conjunction with the Q3 beta?
>
> Strange. I'm not sure what's going on, but Niko has been able to
> reproduce the behavior, so we ought to be able to figure something
> out. We'lll look into it.
>

The problem was caused by a wrong RDBase setting.


If you run into the same issue, try the following
"
from rdkit import RDConfig
print RDConfig.RDDataDir
"

In the RDDataDir, the file "FragmentDescriptors.csv" should be found. If
this is not the case, no fragment descriptors will be calculated.


Paul

P.S.: Thanks to Greg for our offline conversation that help to solve this
issue!

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