I've found information in Bug Toolkit about olders DFM versions with the same problem, but it suposed to be fixed:
CSCsh74986 Bug Details
Notification device selector may be empty
Symptom:
The Device Selector under Device Fault Manager > Notification Services > Notification Groups > Add appears empty (i.e. there are no folders seen). Additionally, the following exception will be seen in the DFMDeviceSelector.log:
java.lang.NullPointerException
at com.cisco.nm.cmf.devsel.DeviceSelectorTreeGenerator.filterMDFGroups(Unknown Source)
at com.cisco.nm.cmf.devsel.DeviceSelectorTreeGenerator.filterMDFGroups(Unknown Source)
at com.cisco.nm.cmf.devsel.DeviceSelectorTreeGenerator.getNextLevelDeviceTypeGroupEntries(Unknown Source)
at com.cisco.nm.cmf.devsel.DeviceSelectorTreeGenerator.getNextLevelNodes(Unknown Source)
at com.cisco.nm.cmf.devsel.DeviceSelectorTreeGenerator.getGroupsAndObjects(Unknown Source)
at com.cisco.nm.cmf.devsel.DeviceSelectorTreeGenerator.getTreeEntries(Unknown Source)
at com.cisco.nm.trx.kdm.utils.NosDeviceSelectorTreeGenerator.getTreeEntries(NosDeviceSelectorTreeGenerator.java:101)
at com.cisco.nm.uii.hos.HOSRequestHelper.generateParameterEntries(HOSRequestHelper.java:4633)
at com.cisco.nm.uii.hos.HOSRequestHelper.constructHOSTree(HOSRequestHelper.java:1015)
at com.cisco.nm.trx.nos.action.NGroup.perform(NGroup.java:107)
Conditions:
This typically occurs when there are wireless devices such as the Wireless LAN Solution Engine managed by DFM. However, other devices may trigger the same behavior.
Workaround:
There is no workaround.
Status
Fixed
Severity
3
Last Modified
In Last month
Product
CiscoWorks Device Fault Manager
Technology
1st Found-In
2.0(6)
Fixed-In
3.0
