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Home > Success Center > Network Performance Monitor (NPM) > Unable to add nodes post NPM 11.5.3 upgrade

Unable to add nodes post NPM 11.5.3 upgrade

Created by Hamza Fahey, last modified by MindTouch on Jun 23, 2016

Views: 948 Votes: 0 Revisions: 5


After upgrading to NPM 11.5.3, you are unable to add any new node(s) to NPM for monitoring.


The following error message is seen in the UDT logs:


[STP SmartThreadPool Thread #0] ERROR SolarWinds.Orion.Core.BusinessLayer.DiscoveryNetObjectStatusManager - Update Discovered Net Object Statuses for profile 15 failed
System.IO.FileNotFoundException: Could not load file or assembly 'file:///D:\Program Files (x86)\SolarWinds\Orion\Wireless\SolarWinds.Wireless.Heatmaps.Strings.resources.dll' or one of its dependencies. The system cannot find the file specified.
File name: 'file:///D:\Program Files (x86)\SolarWinds\Orion\Wireless\SolarWinds.Wireless.Heatmaps.Strings.resources.dll'
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalGetSatelliteAssembly(String name, CultureInfo culture, Version version, Boolean throwOnFileNotFound, StackCrawlMark& stackMark)
   at System.Resources.ManifestBasedResourceGroveler.GetSatelliteAssembly(CultureInfo lookForCulture, StackCrawlMark& stackMark)
   at System.Resources.ManifestBasedResourceGroveler.GrovelForResourceSet(CultureInfo culture, Dictionary`2 localResourceSets, Boolean tryParents, Boolean createIfNotExists, StackCrawlMark& stackMark)
   at System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo requestedCulture, Boolean createIfNotExists, Boolean tryParents, StackCrawlMark& stackMark)
   at System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo culture, Boolean createIfNotExists, Boolean tryParents)
   at System.Resources.ResourceManager.GetString(String name, CultureInfo culture)
   at SolarWinds.Wireless.Heatmaps.Strings.Resources.get_NPMLIBCODE_LL0_3()
   at SolarWinds.Wireless.Heatmaps.BusinessLayer.TechnologyPollingProviderWLHM.<get_Items>d__0.MoveNext()


  • Core / Platform 2015.1.3
  • NPM 11.5.3


The other modules, such as UDT and so on, are not upgraded with Core / Platform and NPM, with related logging set to DEBUG. More details here:


  1. Upgrade UDT and all other SolarWinds modules to the latest versions compatible with Core / Platform 2015.1.3 + NPM 11.5.3, more details here: 
  2. Retest the issue is resolved by adding a node for monitoring via NPM





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