Repairing a Corrupt Map Engine (black maps, not responding, etc.)

Introduction

TNP 11 uses a new map "engine" to display a wide variety of maps from various sources. For example it is this engine that allows the merging of two different map types, regardless of their source, projection, and other characteristics. In short, this engine must process (and constantly update) gigabytes of raster map data on an ongoing basis.

While this engine takes some time to "learn" your areas of interest, it may appear sluggish or "not responding". This is normal, and terminating the application while it is processing maps can result in a corrupt engine. This can also be exasperated by using a poor (intermittent) Internet connection or faulty/outdated video display drivers.

Downloading the Latest Software

As with any software product, especially after a major reworking, there will be a series of patches and improvements made to TNP. The latest (version 11.03) was released on September 5, 2017; prior updates were released in February and April. More releases are scheduled in the coming months - with an update due out roughly every three months. For instructions on downloading the latest version of TNP, please see:
https://tnp.uservoice.com/knowledgebase/articles/165863  
With each update, we attempt to improve the reliability and performance of Terrain Navigator Pro - especially in unusual computing environments revealed after the initial release. We also continue to make incremental improvements based on the feedback we receive from our customers.

Setting the Cache Size

Maximizing the Map/Aerial Photo Cache size will greatly improve TNP's speed and reliability. If you have sufficient hard disk space, open the File menu and choose Preferences, Internet Access and Map Cache. Set the Map/Aerial Photo Cache size to as high as possible (64 GB) as your disk space allows.

Optimum Display Scales

TNP allows you to type in any scale you wish into the toolbar. While this is great for many applications, certain map scales will adversely affect TNP's overall performance. For best results, use map scales of: 1:2,257, 1:4,514, 1:9,028, 1:18,056, and 1:36,112.
 

How do I know if the "engine" is corrupt?

If the maps are not displaying properly, or appear gray or scrambled, then it is likely that the temporary map cache needs to be cleaned up. However, if the maps appear black or Terrain Navigator Pro is constantly shutting down unexpectedly, then the map engine is likely fully corrupt (see below.)

What about "Not Responding"?

"Not Responding" is typically a Windows notification that a specific application is busy. In the case of Terrain Navigator Pro, it likely means that the map engine is processing new map information or recovering from a damaged state. Please be patient when this occurs, and give Terrain Navigator Pro several minutes to complete its tasks. If this extends more than 15 minutes, then something may have gone awry and the program should be terminated. Then repair the fully corrupt map engine (as described below.)

How do I easily fix this?

In most cases, clearing the map cache will repair any map tiles damaged by the download process. Open the File menu and choose Preferences, Internet Access and Map Cache. Press Clear Temporary Cache, press Yes, then wait for TNP to process your request.

In some (rarer) situations, you may need to press Rebuild Map/Aerial Photo Lists, which resets more of TNP's internal mapping engine. Once it has completed, exit Terrain Navigator Pro, wait 2-3 mins for the catalog to save, then restart TNP.

In some cases, the map engine may be fully corrupt, and require resetting outside of TNP. (See below.)

Clearing the temporary cache and rebuilding the map list did not improve my map display. How do I correct a fully corrupt Map Engine?

Please exit Terrain Navigator Pro and use Windows File Explorer to open:
C:\Users\<your windows username>\AppData\Local\Maptech\Terrain Navigator Pro\Engine\

Then delete these folders:
catalog
tmp
view

Note that AppData is a hidden, system folder. It may not be shown unless "Hidden Items" is checked in the Windows File Explorer View tab.

Restart TNP and be patient as it rebuilds. Once it has completed, exit Terrain Navigator Pro, wait 2-3 mins for the catalog to save, then restart TNP. The map engine will be fully rebuilt and Terrain Navigator Pro should perform well (as it learns your areas of interest, map preferences, etc.)

I when I restart Terrain Navigator Pro, I get a message "Only one copy of 'Terrain Navigator Pro' can run at a time". What's that?

That message indicates that your prior session of Terrain Navigator Pro is still processing and saving its map engine. When you close TNP, it returns you to the Windows desktop as soon as it can, but it will continue to run "in the background" for up to five minutes while the map engine finishes its tasks. Please give it a chance to complete this process before restarting TNP (or shutting down your PC.)

My map engine seems to corrupt easily and TNP terminates unexpectedly. How do I fix it permanently?

The likely root cause is outdated or faulty video display drivers. To learn how to properly apply these important updates to your PC, please see:
https://tnp.uservoice.com/knowledgebase/articles/172076

I have more questions/concerns about TNP 11. I'm even considering downgrading back to version 10.

Before downgrading, please have a look at this article:
https://tnp.uservoice.com/knowledgebase/articles/1110553
It contains many additional tips and tricks on how to make the most of TNP 11. It also includes instructions (and ramifications) to downgrade to TNP 10.42.

General Questions (FAQs) and How-To Answers

  1. Getting Started with Terrain Navigator Pro
  2. Coordinates: Definitions and Overview
  3. What are Layers? What's the difference between markers, routes, tracks, etc.?
  4. Organizing Layers with Projects
  5. Managing Projects, Splitting the Default Project, Project Synchronization to TNP Mobile/Web, and Other Tips
  6. How do I obtain an area measurement?
  7. Street Layer. Can I turn it off? What about updates/inaccuracies? (And other common questions)
  8. What is a MapPack and how do I use it to show photos when TNP has no Internet Connection?
  9. Transferring Project Layers to a new PC
  10. How to Disable Registration and Subscription Renewal Notices
  11. Red Triangles on the maps. Can I toggle them off? (And other common questions)
  12. Apple Mac OS and Terrain Navigator Pro
  13. Adding Land Use, Boundaries, and other GIS Information to TNP
  14. Using Existing Markers to Create a Route in TNP
  15. Creating Routes via Bearing/Distance (metes and bounds) - by Azimuth or Quadrant bearings.
  16. Adding Waypoints within a Route; Appending Routes Together
  17. My Markers, Routes, etc., are way too big (or too small.) What's going on?
  18. Attaching Maps to an Email
  19. How do I make TNP open my map every time it starts?
  20. Recording 3-D Video Clips
  21. Keyboard Shortcuts
  22. Error Loading Polygon or Error Loading GeoPin when TNP starts.
  23. TNP System Requirements
  24. Video and Printer Driver Updates: How to apply them to improve Terrain Navigator
  25. Repairing a Corrupt Map Engine (black maps, not responding, etc.)
  26. Google Earth doesn't interface properly with TNP

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