Novell ZENworks 10 Configuration Management with Support Pack 2 - 10.2
Randomly, possibly host device specific, launching RM from ZCC fails.
ERROR: (from novell-zenworks-vncviewer.txt ): "Socket error= 10049 "
This is fixed in version 10.2.1 - see KB 7003766 "ZENworks 10 Configuration Management 10.2.1 - update information and list of fixes" which can be found at https://www.novell.com/support
In 10.2.1 and higher, check the proxy address being used to ensure it's valid.