Hi Sean We tried to add the SideEffectAnnotator class (add org.apache.ctakes.sideeffect.ae.SideEffectAnnotator) to the piper, But during initialization of the class we are getting below exception . issue: ERROR ProcessDirPiperRunner - Initialization of annotator class "org.apache.ctakes.sideeffect.ae.SideEffectAnnotator" failed. (Descriptor: <unknown>) Could you please check the same and let us know the details. Thanks & Regards AMAL M 9633746869