Network Management

NTM 2.2 error Network Topology Mapper encountered an unexpected error and needs to close

This article will show you how to fix the NTM 2.2 error "Application Error Network Topology Mapper encountered an unexpected error and needs to close." when doing a scan.

First published date

6/10/2020 6:56 AM

Last published date

6/20/2025 3:26 PM

Overview

While doing a subnet scan via Network Topology Mapper (NTM) you may see the below error:

Application Error Network Topology Mapper encountered an unexpected error and needs to close 

And when you check the NTM logs, you will see a similar error to this

2020-06-10 15:26:38,454 [STP SmartThreadPool Thread #0] WARN  SolarWinds.NTM.Topology.Calculation.CalculationDataLoader - DataLoader ProvideAlternativeIPs was not found, skipping.
2020-06-10 15:26:38,469 [STP SmartThreadPool Thread #0] ERROR SolarWinds.Orion.Topology.Common.CodeStructures.ObjectTypeFactory.ObjectTypeFactoryBase`1 - Unable to find type identifier 'CalculatePagpCdp' in list of SolarWinds.Orion.Topology.Calculation.Data.DataLoaders.DataLoadersFactory known types
2020-06-10 15:26:38,469 [STP SmartThreadPool Thread #0] WARN  SolarWinds.NTM.Topology.Calculation.CalculationDataLoader - DataLoader CalculatePagpCdp was not found, skipping.


 

Product section

Network Topology Mapper

Cause

You are using a non-admin account while running the NTM application.

Resolution

Make sure UAC (Optional) is set to low on the Machine where you launched the NTM application.

  1. Right-click on the NTM application executable
  2. Select Properties
  3. Go to the compatibility tab
  4. Check the "Run this program as administrator"

 

Option 2:

Right-click on the application and choose "Run as Administrator".