> I just got this message, and I am pretty sure the CDK does this wrong
> too... the original problem was that InChI generation failed, because
> a SDF was read wrongly...

To be more accurate, and according to Wolf-D.Ihlenfeldt, It's not much
that the SDF was read wrongly (if I understood well what you said), on  
the contrary: the inchi software  1.02 is making use of the strict  
bond type definition of the MDL  format, in which bond type values  
ranging from 4 to 8 should be used for SSS query ONLY.

That's the reason why inchi calculation failed when the aromatic bond
type 4 is used in the actual structure definition.

Now the weird thing is that the inchi calculation does not fail for
all aromatic structures having bond types set to 4 (see the rest of
the discussion on the inchi user list on sourceforge), but (based on
my own observations) only fail when the molecules contains
aromatic heterocycle having at least one nitrogen...

As the CDK makes use of the inchi toolkit recompiled to be run as java
program, I'm guessing these issues are the same.

Vincent


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