Exception error when running the ProcessPurge tool

Hello,

I am getting this error: "Exception in thread "main" java.lang.NoClassDefFoundError: com/adobe/idp/jobmanager/common/JobManagerException" when I try to run the ProcessPurge Tool from the LiveCycle_ES_SDK this time. I did not have this error when I ran it couple times before. Can any one please help with this error. I am still running LiveCycle ES 8.2.1 with Service Pack 3.

Thanks in advance,

Han Dao