Error using major microspecies in custom script

I get this error, if I feed the attached mol file into the attached custom script.

Thanks

Sam

Exception in thread "main" java.lang.RuntimeException: sgroups[0] == null in clonecopy

        at chemaxon.struc.Molecule.clonecopySgroups(Unknown Source)

        at chemaxon.struc.Molecule.clonecopy(Unknown Source)

        at chemaxon.struc.Molecule.cloneMolecule(Unknown Source)

        at chemaxon.struc.Molecule.cloneMoleculeWithDocument(Unknown Source)

        at chemaxon.marvin.plugin.CalculatorPlugin.setMolecule(CalculatorPlugin.java:810)

        at chemaxon.marvin.calculations.MajorMicrospeciesPlugin.setMolecule(MajorMicrospeciesPlugin.java:106)

        at chemaxon.marvin.plugin.CalculatorPlugin.setMolecule(CalculatorPlugin.java:777)

        at chemaxon.marvin.plugin.CalculatorPlugin.setMolecule(CalculatorPlugin.java:760)

        at ChargeMol.main(ChargeMol.java:46)

Dear Samuel, 

we are investigating this problematic issue. Please note that as your input is a repeating unit and not a molecule, many of our calculations (e.g. pKa) are meaningless. However, when the input is fed into such a plugin, an error message window is shown on the output as a notification.

Best regards, 

Daniel