Hi David,

Can you provide the input file?

Regards,
- Noel

On Tue, 26 Nov 2019 at 09:50, David van der Spoel <sp...@xray.bmc.uu.se>
wrote:

> Den 2019-11-26 kl. 10:12, skrev Noel O'Boyle:
> > An SDF file describes the number of hydrogens on each atom. Open Babel
> > is neither adding nor removing them. AddHydrogens() is just making them
> > explicit.
> Unfortunately, no. The structure below has 7 hydrogens and one charge
> but obprop adds one H and 4 (!) charges.
>
> % obprop 2-aminoguanidinium.sdf
> name             2-aminoguanidinium.sdf 1
> formula          CH8N4+++++
>
>
>
>
>
>   OpenBabel11261907103D
>
>   12 11  0  0  0  0  0  0  0  0999 V2000
>     -1.5988   -0.6139    0.0135 N   0  0  0  0  0  0  0  0  0  0  0  0
>     -0.4655    1.3957   -0.0077 N   0  0  0  0  0  0  0  0  0  0  0  0
>      0.7405   -0.6123    0.0118 N   0  0  0  0  0  0  0  0  0  0  0  0
>      1.9392    0.1153    0.0724 N   0  0  0  0  0  0  0  0  0  0  0  0
>     -0.4481    0.0607    0.0074 C   0  0  0  0  0  0  0  0  0  0  0  0
>     -1.6144   -1.6250    0.0385 H   0  0  0  0  0  0  0  0  0  0  0  0
>     -2.4894   -0.1345    0.0041 H   0  0  0  0  0  0  0  0  0  0  0  0
>     -1.3186    1.9349   -0.0175 H   0  0  0  0  0  0  0  0  0  0  0  0
>      0.4173    1.8753   -0.1389 H   0  0  0  0  0  0  0  0  0  0  0  0
>      1.9696    0.6569    0.9451 H   0  0  0  0  0  0  0  0  0  0  0  0
>      2.7365   -0.5322    0.1048 H   0  0  0  0  0  0  0  0  0  0  0  0
>      0.8109   -1.6139   -0.1611 H   0  0  0  0  0  0  0  0  0  0  0  0
>    1  6  1  0  0  0  0
>    2  8  1  0  0  0  0
>    4  3  1  0  0  0  0
>    4 11  1  0  0  0  0
>    4 10  1  0  0  0  0
>    5  1  1  0  0  0  0
>    5  2  1  0  0  0  0
>    5  3  1  0  0  0  0
>    7  1  1  0  0  0  0
>    9  2  1  0  0  0  0
>   12  3  1  0  0  0  0
> M  CHG  1   1   5
> M  END
>
> >
> > Regards,
> > - Noel
> >
> > On Tue, 26 Nov 2019 at 06:50, David van der Spoel <sp...@xray.bmc.uu.se
> > <mailto:sp...@xray.bmc.uu.se>> wrote:
> >
> >     Hi,
> >
> >     I was trying to use obprop on an SDF file, but found out that it adds
> >     one hydrogen to my compound that should not be there. I then went to
> >     look at the code and removed these two lines
> >             if (!mol.HasHydrogensAdded())
> >               mol.AddHydrogens();
> >     recompiled and installed.
> >     Lo and behold, the bug is still there! That is, upon reading an SDF
> >     file
> >     the library already adds a hydrogen that shouldn't be there.
> >
> >     What to do about this?
> >     Replace
> >             conv.Read(&mol, &ifs);
> >     by a new call
> >             conv.ReadAndDoNotModifyMyCompound(&mol, &ifs);
> >
> >     Other suggestions?
> >
> >     --
> >     David van der Spoel, Ph.D., Professor of Biology
> >     Head of Department, Cell & Molecular Biology, Uppsala University.
> >     Box 596, SE-75124 Uppsala, Sweden. Phone: +46184714205.
> >     http://www.icm.uu.se
> >
> >
> >     _______________________________________________
> >     OpenBabel-Devel mailing list
> >     OpenBabel-Devel@lists.sourceforge.net
> >     <mailto:OpenBabel-Devel@lists.sourceforge.net>
> >     https://lists.sourceforge.net/lists/listinfo/openbabel-devel
> >
>
>
> --
> David van der Spoel, Ph.D., Professor of Biology
> Head of Department, Cell & Molecular Biology, Uppsala University.
> Box 596, SE-75124 Uppsala, Sweden. Phone: +46184714205.
> http://www.icm.uu.se
>
>
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