Output a CDKCell

Hi all,
I am writing a node that outputs a column of CDKCell which stores IAtomContainer object. I already imported the available knime-cdk.jar library (file attached) but my node fails with a  null returned when I tried to create a column:
DataColumnSpec[] allColSpecs = new DataColumnSpec[1];
allColSpecs[0] =
 new DataColumnSpecCreator("Molecules Properties", CDKCell.TYPE).createSpec();
I appreciate any help.

You must not import the Jar file but instead add a dependency to the CDK plug-in in your plug-in.

Hi Thor,

Thanks for your comment but when I imported the external library (the jar file), the library imported has already been added to Plug-in Dependencies.

I appreciate any help. Thanks