Last Boot Time Missing or NULL for WMI Node in SolarWinds Self-Hosted Platform

7/23/2020 5:57 PM

12/8/2025 5:16 PM

This article addresses an issue where the Last Boot Time for a Windows node monitored via WMI in SolarWinds appears as Null or Empty.

Orion Platform

• The poller entry is N.Uptime.WMI.XP which is not applicable for some Windows nodes

ErrorCode=5  
ErrorMessage=Cannot retrieve data from 'X.X.X.X' at namespace 'root\CIMV2'  
Query: select SystemUpTime from Win32_PerfFormattedData_PerfOS_System  

Querying the class using wbemtest may also return Invalid class.

1. Ensure the Node is Managed

Check whether the affected node is Unmanaged.

Steps:

1. Go to Web Console > Settings > Manage Nodes

2. Select Group by → ADM Status

3. Expand Unmanaged

4. If the affected node appears there:

   • Select the node

   • Go to Maintenance → Manage

After re-managing, wait for the next polling cycle.

---

2. Check Poller Configuration in the Database

If the node is already managed, verify whether it is using N.Uptime.WMI.XP or N.Uptime.WMI.Generic.

Steps:

1. Open Database Manager

2. Run the following query to locate the pollers assigned to the node::

SELECT TOP 1000 *
FROM Pollers
WHERE PollerType LIKE '%N.Uptime.WMI%' AND NetObjectID = <NodeID>;

-- Scripts are not supported under any SolarWinds support program or service.
-- Scripts are provided AS IS without warranty of any kind. SolarWinds further
-- disclaims all warranties including, without limitation, any implied warranties
-- of merchantability or of fitness for a particular purpose. The risk arising
-- out of the use or performance of the scripts and documentation stays with you.
-- In no event shall SolarWinds or anyone else involved in the creation,
-- production, or delivery of the scripts be liable for any damages whatsoever
-- (including, without limitation, damages for loss of business profits, business
-- interruption, loss of business information, or other pecuniary loss) arising
-- out of the use of or inability to use the scripts or documentation.

3. If you see N.Uptime.WMI.XP, this poller should be replaced.

Update Poller Type

Option A: Using Database Manager (Recommended)

1. In Database Manager, click Enable Table Editing

2. Locate the record where:

   • PollerType = N.Uptime.WMI.XP

3. Change the value to:  N.Uptime.WMI.Generic

4. Save changes.

Option B: Using SQL Queries:

1. Create a Backup of the Database.
2. Connect to the SolarWinds Platform server.
3. Open Database Manager from the SolarWinds Platform folder of the start menu.
4. Select Add Orion Server and expand the SQL server in bold.
5. Right-click the SolarWindsOrion database and select New Query.
6. Paste the SQL query below into the window on the right and select Execute query:

UPDATE Pollers
SET Enabled = 1
WHERE NetObjectID = <NodeID>
  AND PollerType = 'N.Uptime.WMI.Generic';

UPDATE Pollers
SET Enabled = 0
WHERE NetObjectID = <NodeID>
  AND PollerType = 'N.Uptime.WMI.XP';

-- Scripts are not supported under any SolarWinds support program or service.
-- Scripts are provided AS IS without warranty of any kind. SolarWinds further
-- disclaims all warranties including, without limitation, any implied warranties
-- of merchantability or of fitness for a particular purpose. The risk arising
-- out of the use or performance of the scripts and documentation stays with you.
-- In no event shall SolarWinds or anyone else involved in the creation,
-- production, or delivery of the scripts be liable for any damages whatsoever
-- (including, without limitation, damages for loss of business profits, business
-- interruption, loss of business information, or other pecuniary loss) arising
-- out of the use of or inability to use the scripts or documentation.