Novell ZENworks 11 Configuration Management
ERROR in zmd-messages.log and ZCC
"Communication with ZESService has failed.Please do check whether ZESService is running or not."
[ WARN] [02/08/2011 04:58:18.921]  [ZenworksWindowsService]   [Endpoint Security Management Module] [ZESMPolicyHandler.ZESMPHSTATUS_FAILED] [Communication with ZESService has failed.Please do check whether ZESService is running or not.]  
This is fixed in version 11.1 - see KB 7008746 "ZENworks Configuration Management 11.1 - update information and list of fixes" which can be found at https://www.novell.com/support
This message does not necessarily indicate a problem. If this message occurs at startup, then the most likely cause is that the ZESService is not yet running when the ZENworks Agent service starts; this is normal, as the Windows may take over 5 minutes or so to load all services.
If this message only happens at startup, then it can safely be ignored.