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Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.
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at com.thortech.xl.integration.ActiveDirectory.tcADUtilLDAPController.hashTableEnvForDirContext(Unknown Source)
at com.thortech.xl.integration.ActiveDirectory.tcADUtilLDAPController.connectToAvailableAD(Unknown Source)
at com.thortech.xl.integration.ActiveDirectory.tcADUtilLDAPController.getAttributeValues(Unknown Source)
at com.thortech.xl.integration.ActiveDirectory.tcUtilADTasks.addUserToGroup(Unknown Source)