Apologies for the delayed reply. The version of Pega used is 7.2.2 and the PegaRULES log file has a single line entry as below.
Any guidance is greatly appreciated !!!
2017-07-06 01:36:23,856 [http-apr-8080-exec-1] [ STANDARD] [ ] [PegaCSFSSample:07.22] (PegaCA_Work_Interaction.Action) INFO CSFSSysAdmin - Error while opening theWork Object from Databasecom.pega.pegarules.pub.clipboard.InvalidParameterException: cannot be null. page: D_Interaction. Details: Invalid value for aSource passed to com.pega.pegarules.data.internal.clipboard.ClipboardPageImpl.putAll(Map, byte)