Substructure search does not always return results

We've noticed that certain substructure searches do not return results even though we know that structures exist in our database that have the structure used in the search as the substructure (or exact structure).  Exact searches and Similarity searches seem to return the correct results.  Is this a bug in 3.2.6?

Hi,

 

Could you provide one or more query - target example pairs please ?

If the structures are confidential you can send them to the support e-mail instead on the top of this page.

 

Also how do you use our search tools (ChemAxon application, JChemBase API, cartridge, etc.) ?

 

Best regards,

 

Szilard