Hi Andrew,

On Mon, Apr 30, 2012 at 10:32 PM, Andrew Dalke
<[email protected]> wrote:
>
>>>> from rdkit import Chem
>>>> writer = Chem.SDWriter("/dev/stdout")
>>>> for mol in Chem.ForwardSDMolSupplier("CHEMBL1269997.sdf"):
> ...   writer.write(mol)
> ...
> [22:11:05]
>
> ****
> Invariant Violation
>
> Violation occurred on line 388 in file 
> /tmp/homebrew-rdkit-HEAD-Ebdo/Code/GraphMol/FileParsers/MolFileStereochem.cpp
> Failed Expression: pick >= 0
> ****
>
> Traceback (most recent call last):
>  File "<stdin>", line 2, in <module>
> RuntimeError: Invariant Violation
[snip]
> This error was previously reported in the thread JP started, titled 
> "Invariant violation...", dated July 6, 2011. Greg replied:
>
>> Wow that is certainly an error I never expected to see. From the code,
>> I guess the molecule has a stereocenter that is surrounded by other
>> stereocenters and something extremely unfortunate is happening with
>> the way decisions are being made about which bonds to wedge. As Eddie
>> requested in an earlier message, it would be helpful to have the input
>> that produced the error so that it can be added to the test cases (and
>> so that I can be sure the problem is fixed once I figure out how to).
>
> but I see no posting of a failing structure. I hope the attached structure 
> helps resolve this problem.

I fixed this today and checked in the changes.
Here's the bug report:
https://sourceforge.net/tracker/index.php?func=detail&aid=3525000&group_id=160139&atid=814650#

Please give it a try and let me know how it looks.

-greg

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