Novell ZENworks Configuration Management 11.2
Random managed devices fail to see system update assignment when system update is in the "All Devices" stage. The zSystemUpdateDeviceInfo table shows isApplicable set to 0 for these devices. zman system-update-list-assignments does not show the assignment, but zman system-update-assign does create the assignment correctly.
This is fixed in version 11.2.4 - see KB 7012027 "ZENworks Configuration Management 11.2.4 - update information and list of fixes" which can be found at http:////support.microfocus.com/kb/doc.php?id=7012027