Hi Laurence,
Did you check kba 1772037 - PcdCheckTool fails to start with java.lang.NoSuchMethodException: com.sapportals.portal.pcd.admintools.standalone.console.MainConsole.main([Ljava.lang.String;)
If that is not applicable for your version can you please let me know what version you are on.
Thanks and regards,
Lorraine