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Error message

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Hi ..

When running a message appears

Error message : NullReferenceException was unhandled

code

Code:

    Public Shared Function GetNonWorkingDevices()
        Dim pc As String = "."
        Dim wmi As Object = GetObject("winmgmts:\\" & pc & "\root\cimv2")
        Dim devices As Object = wmi.ExecQuery("Select * from Win32_PnPEntity WHERE ConfigManagerErrorCode <> 0")
        For Each d As Object In devices
            Dim list As ListViewItem
            list.ListView.Items.Add(d.name())
        Next
    End Function


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