Alex’ Projects ► Little Navmap - Frequently asked Questions

Little Navmap Little Navmap - Frequently asked Questions

See user manual for general known problems:
► User Manual - Known Problems.

See user manual for limitations and issues around Microsoft Flight Simulator 2020:
► User Manual - Known Problems - Microsoft Flight Simulator 2020.

Read the linked chapter below to minimize issues when loading flight plans into MSFS:
► User Manual - Microsoft Flight Simulator 2020 Airports and Navdata.

Read below if you plan to use Little Navmap on a remote computer across a network to avoid common mistakes:
► User Manual - Network Setup.

Use your browser search function (usually Ctrl+F for Windows and Linux or ⌘+F for macOS) to find topics or keywords.

Troubleshooting

  1. How to fix issues

Installation

  1. How to update the program
  2. Where are the log and configuration files?
  3. My anti-virus or anti-malware complains about Little Navmap
  4. Why can I see only the X-Plane connect option
  5. I found an issue or have a proposal
  6. The program crashes
  7. The program does not start and Windows shows an error message
  8. I’d like to completely remove the program and all of its traces

General

  1. How can I create a flight plan
  2. The map is jumping around randomly while flying
  3. How to backup userdata or the logbook
  4. Navaids or airways are red in the flight plan table
  5. Search result is empty
  6. I get fuel flow indications that don’t match Little Navmap’s values
  7. Fuel planning and collection gives wrong fuel values
  8. I cannot see my aircraft
  9. The flight plan does not show up correctly in MSFS

Airports, scenery library and navigation data

  1. I cannot see any airports or navaids
  2. I added an airport and it does not show up in Little Navmap
  3. Search for airport by country, state or city does not work
  4. Airport runway numbers don’t match the runway numbers for procedures
  5. How to add procedures to airports?
  6. A MSFS add-on does not show up after reloading the scenery library in Little Navmap
  7. How can I update the navdata to the latest cycle
  8. I updated the navdata but it does not show up
  9. I cannot see aprons and taxiways on the map
  10. I cannot choose a start position
  11. Some procedures or procedure legs are marked red in the selection/search tree
  12. Navaids from the X-Plane user_nav.dat and the user_fix.dat files do not show up in Little Navmap

User Interface and Windows

  1. How can I make the map window bigger
  2. How can I make the map window larger
  3. I cannot resize a dock window

Map Display

  1. The map moves jerky or I see stutters in Little Navmap while scrolling or zooming
  2. Lines disappearing
  3. I cannot remove a traffic pattern, a holding or measurement lines
  4. Map is fuzzy and not updating
  5. The map has a grayish or dark background when zooming in
  6. Why isn’t the terrain mesh shown far North and South?
  7. Map background is black
  8. Can I run the program on another client computer across the network
  9. Can I see the program when running FSX, P3D, MSFS or X-Plane fullscreen
  10. The map window is not visible or shows only a gray surface

Apple macOS

  1. Where is the options menu item on macOS
  2. I get a message complaining about an unidentified developer on macOS
  3. Cannot run Little Navmap or Little Xpconnect on macOS Catalina

X-Plane and Little Xpconnect

  1. I installed Little Xpconnect but cannot find it in the X-Plane menus
  2. A pop up window says my versions are not compatible Little Xpconnect needs to be updated
  3. Weather in X-Plane does not match what Little Navmap displays
  4. I get an error message about missing directories when loading X-Plane scenery
  5. Airports missing in X-Plane scenery after reloading
  6. I still see an older AIRAC cycle in the Scenery Libary menu for X-Plane
  7. Little Xpconnect does not load in Ubuntu 18.04 or derived Linux distributions

Frequently asked Questions and Issues

Troubleshooting

How to fix issues

You can try the following if you experience problems like crashes, freezes, a corrupted window layout or other issues.

First update Little Navmap if you’re not running the latest version.

Corrupted window layout or missing map window

Try Window -> Reset Window layout to default or load a previously saved window layout file (see Saving and Loading Layouts).

If this does not help, try the suggestions below.

Quick and simple Solution

Go to the Little Navmap main menu Tools and select Reset all Settings and restart. Little Navmap will show a question dialog and then restart after deleting all settings.

If this does not help, you can restore the settings file backup which was mentioned in the dialog.

More complicated but thorough option

Quit Little Navmap and rename the main settings folder ABarthel which contains all simulator databases and is stored in the following places:

  • Windows: C:\Users\YOURUSERNAME\AppData\Roaming\ABarthel
  • Linux: /home/YOURUSERNAME/.config/ABarthel
  • macOS: /Users/YOURUSERNAME/.config/ABarthel

Do not delete the folder, but rename it to keep your settings if this does not fix the problem.

Start Little Navmap and see if the issue is gone.

If this did not help: Quit Little Navmap. Delete ABarthel which was just created newly by the program and rename your backup again to ABarthel to get your settings and databases back.

Report the problem

If nothing helps, report an issue either in the Support Forum at Avsim or send me an email through Contact and Support.


Installation

How to update the program

You might either:

  • Delete the previous version of Little Navmap and install the new one in the same place.
  • Install the new version in a new folder, e.g. by using the version as a directory name suffix.

In either case do not merge the two old and new directories. Remains of previous versions might cause trouble.

Always update all related programs like Little Navconnect and Little Xpconnect.


Where are the log and configuration files?

The files can be opened in the default text editor from menu -> Tools -> Files and Directories -> Open Log File in Little Navmap.

For Windows these are:

Log file: C:\Users\YOURUSERNAME\AppData\Local\Temp\abarthel-little_navmap.log

Configuration file: C:\Users\YOURUSERNAME\AppData\Roaming\ABarthel\little_navmap.ini

Details can be found in the Files chapter in the manual.


My anti-virus or anti-malware complains about Little Navmap

This is usually a false positive.

I usually upload all Zip files to VirusTotal before making them public. This ensures that the files are checked by 50 or more anti-virus programs.

You can send your downloaded files to VirusTotal and you will get the report from my uploads immediately.

One false positive might occur and is no reason for concern.


Why can I see only the X-Plane connect option

Little Navmap comes with a SimConnect library version 10.0.61259.0 (FSX SP2 / no Acceleration) and does not require a separate installation of SimConnect.

The included SimConnect library is compatible with all FSX and P3D versions as well as Microsoft Flight Simulator 2020.

The X-Plane connect option is always shown. You probably installed Little Navmap on a computer that has no FSX, P3D or MSFS installation. See User Manual - Network Setup if you intend to run Little Navmap on a remote computer.


I found an issue or have a proposal

All ideas and bugs are collected in the Github Issues for Little Navmap.

First check if your idea or finding is already covered there.

If not you can register at Github and write an issue. Alternatively, you can send me an email and I put this on my internal list or create an issue for bigger tasks.

For errors send me a bug report in the Avsim Support Forum or by email. See How to report a Bug.


The program crashes

Rename the settings directory which also contains the scenery databases. In Windows these can be found in c:\Users\YOURUSERNAME\Appdata\Roaming\ABarthel. E.g. rename ABarthel to ABarthel.backup.

If the problem persists send me a bug report in the Avsim Support Forum or by email. See How to report a Bug.


The program does not start and Windows shows an error message

Windows shows an error message cannot proceed because libmarblewidget-qt5.dll was not found or similar when trying to start Little Navmap.

This can have several reasons:

  • Not all files were extracted and the mentioned DLL file is missing. Check if it present in the same folder as the littlenamvmap.exe.
  • Anti-virus put the DLL into quarantine.
  • You start the program using a shortcut (.lnk file) and the working directory is not the Little Navmap folder (the one with the littlenamvmap.exe). The working directory can be changed in the link properties in input field Start In.


I’d like to completely remove the program and all of its traces

All files and folders created by Little Navmap are described in the chapter Files in the manual.

Little Navmap does not create any registry entries on Windows.


General

How can I create a flight plan

Zoom to an airport in the map and right click on it. Select Set ... as Flight Plan Departure. Look for another airport on the map, right click and select Set ... as Flight Plan Destination.

That’s it. You just built a simple flight plan.

Have a look at the Tutorials which are also linked in the help menu. These help to get around in the program.


The map is jumping around randomly while flying

The map does not jump randomly. The level of zoom changes to keep aircraft and the next flight plan waypoint centered.

The default behavior is to keep aircraft and next flight plan waypoint on the screen once one flight plan leg is active (magenta), i.e. you’re flying. You can move around the map manually but LNM jumps back to aircraft and waypoint after a while. All this is configurable in options on page Simulator Aircraft.

You can also revert to simple aircraft centering, for example. The default values might be confusing first but they are like that to reduce the need for manual zooming.

If you switch to normal zooming you can change the level of zoom with the mouse wheel other other methods.

Please also read the note about the special gestures in the linked manual chapter above.


How to backup userdata or the logbook

One way to backup is export all into a CSV file. This covers all used fields.

You can also backup the database directly. The userpoints and logbook entries are stored in a SQLite database. If interested you can look into this database using tools like this one: SQLitebrowser

The main database is C:\Users\YOURUSERNAME\AppData\Roaming\ABarthel\little_navmap_db\little_navmap_userdata.sqlite and little_navmap_logbook.sqlite respectively in Windows and $HOME/.config/ABarthel/little_navmap_db/little_navmap_userdata.sqlite in macOS or Linux.

You have to close Little Navmap before creating a backup or replacing the databases.

Little Navmap also creates three rolling backups (little_navmap_userdata.sqlite.1, etc.) on startup which you can use if you deleted something accidentally.


Navaids or airways are red in the flight plan table

This can happen if you load a flight plan which was made using older navdata.

It might contain waypoints that were removed later or radio navaids that were decommissioned. These cannot be found in later AIRAC cycles and therefore not in Little Navmap’s database. These are shown in red and are treated like user defined flight plan waypoints in Little Navmap.

Airways are displayed in red if they do not exist or the minimum or maximum airway altitude restrictions are violated by the selected cruise altitude when loading the flight plan.

See also User Manual - Flight Plan - Error Display.


Search result is empty

Check the drop down menu for the change indicator * and the search fields for any remaining text if the distance search does not give any or unexpected results. Use Reset Search in the context menu of the result table or press Ctrl+R to clear all search criteria.

Note that using an ICAO code for searching will temporarily override all other options. This helps to do a quick search for an airport.


I get fuel flow indications that don’t match Little Navmap’s values

Fuel flow in the tab Performance of Little Navmap does not match to what the aircraft is showing.

An aircraft add-on probably uses doctored values to workaround simulator limitations. This happens often with complex study level add-ons and might affect fuel calculation, planning and especially collection.


Fuel planning and collection gives wrong fuel values

This is related to wrong fuel indications of an add-on aircraft. See above.

You can still create an aircraft performance profile manually and ignore the indications.

Set TAS and fuel flow for typical cruise level.

For fuel flow, TAS and vertical speed in the descent and climb phases simply get the values at low altitude, near cruise altitude and then enter the average in Little Navmap. Tune the profile manually as needed.

It might also be beneficial to create different profiles for different cruise altitude ranges, especially for large complex aircraft.


I cannot see my aircraft

Little Navmap does not connect automatically to a simulator per default. You have to go to the main menu -> Tools -> Flight Simulator Connection.

See User Manual - Connecting to a Flight Simulator.


The flight plan does not show up correctly in MSFS

MSFS has many issues loading flight plans. Additionally the format is not documented yet which requires a lot of guesswork.

The following issues are known so far:

  • MSFS automatically adds transitions to approach procedures as well as SID and STAR if plan is of type IFR. Changing these results in a completely new routing.
  • Saving a direct plan between two airports of type IFR will result in MSFS adding intermediate waypoints and procedures like SID and STAR.
  • You cannot use airways or procedures for VFR flight plans. MSFS will quietly remove these.
  • MSFS cannot load round trips where destination is equal to departure in some cases.
  • MSFS uses turn anticipation which may result in wrong flight plan display in the GPS units or autopilot behavior. The GPS or autopilot will take a shortcut for hard turns which sometimes messes up a flight plan, for example. Turn anticipation is a function performed by FMS or RNAV devices to tell the pilot when to initiate a turn to the next waypoint on the programmed flight path to avoid overshooting the programmed course.
  • Altitude at waypoints and sometimes the cruise altitude is ignored and replaced by MSFS’ own idea of a climb and descent profile which has nothing to do with the Little Navmap profile. This happens despite Little Navmap saving the altitude for each waypoint.
  • Flight plan names must not contains special characters like umlauts or accents. Little Navmap replaces these automatically when exporting a plan.

Apart from these issues above you might see MSFS crashes or corrupted flight plans when loading.

Also read the chapter Microsoft Flight Simulator 2020 Airports and Navdata in the Little Navmap user manual to minimize issues with different navdata.


Airports, scenery library and navigation data

I cannot see any airports or navaids

Load the scenery library from the simulator. See Load Scenery Library Dialog in the manual.


I added an airport and it does not show up in Little Navmap

You have to reload the scenery library. See Load Scenery Library Dialog. in the manual.

See topic below for limitations with MSFS.


Data sources limit this functionality and it depends on the selected navdata source in menu Scenery Library:

  • Navigraph only: This has only limited administrative airport information. Only airport name (Frankfurt am Main), ICAO code (EDDF), ICAO region (ED) and area code (EUR) are available.
  • All other modes: The completeness of administrative information depends on the airport. Administrative data (State, City, etc.) is often missing for X-Plane airports. Country information is missing in MSFS.


Airport runway numbers don’t match the runway numbers for procedures

This depends on the scenery mode as set in the menu Scenery Library -> Navigraph. The default is to use the flight simulator scenery for runways and ILS and the Navigraph database for all airspaces, airways and all other navaids.

Runways are named by the magnetic direction which changes over the years. This results in airports renaming their runways from time to time. Therefore, mismatches between old airports, be it stock or add-on, can happen.

It’s neither a Little Navmap nor Navigraph issue. It is an unavoidable real world issue where simulator scenery or airports are not updated as fast as the real world airports.

See the Navdata chapter in the manual for more information.

For FSX or Perpar3D you can use the Airport Design Editor to change the runway numbers.

Use WED to change an airport for X-Plane.


How to add procedures to airports?

This is a very complex task.

For FSX or Perpar3D you can use the Airport Design Editor, add procedures to the airport and then switch off Navigraph in the scenery library menu. LNM will read the procedures from your add-on airport and you can use them like the others.

X-Plane: You can try to create a CIFP file but this is very complex and not recommended as stated on the page here.

See Navdata in X-Plane 11 and XP-CIFP1101-Spec.pdf.


A MSFS add-on does not show up after reloading the scenery library in Little Navmap

Encrypted add-on airports in MSFS cannot be read by Little Navmap. The add-on is locked down with a DRM scheme if you find a file BGL.fsarchive in the add-on folders

Note that Little Navmap reads only add-on scenery which has "content_type": "CORE" or "content_type": "SCENERY" set in the file manifest.json of the add-on. Some add-on developers still use wrong values like "UNKNOWN" which will cause Little Navmap to ignore the scenery. You can change the manifest.json manually in a text editor and replace the wrong "UNKNOWN" with "SCENERY".

See also User Manual - Know Issues.


How can I update the navdata to the latest cycle

You have to get a Navigraph subscription. This allows you to update the Little Navmap navdata to the latest.

I recommend to keep Little Navmap, the simulator and all tools on the same AIRAC cycle to avoid issues when loading flight plans.


I updated the navdata but it does not show up

You should use the automatic scan in the FMS Data Manager which usually finds the correct path.

See Little Navmap - Install Navigraph Updates to see how to set the path correctly if the automatic scan did not find the path.


I cannot see aprons and taxiways on the map

There are only white bars with a black outline showing the runways.

You probably selected Use Navigraph for all Features in the Scenery Library menu. Use Navigraph for Navaids and Procedures is the recommended mode which will show detailed stock or add-on airports mixed with Navigraph navaids.

See Navigation Databases in the manual.


I cannot choose a start position

You might use the wrong scenery mode Use Navigraph for all Features. See Navigation Databases and Microsoft Flight Simulator 2020 Airports and Navdata for more information about this.

Select either Use Navigraph for Navaids and Procedures or Do not use Navigraph Database depending on information in above links (Navigraph MSFS update installed or not).


Some procedures or procedure legs are marked red in the selection/search tree

This can happen if navdata read from the simulator has errors or is incomplete. Note that this issue appears only when using Do not use Navigraph Database in the menu Scenery Library.

The procedures cannot be used at all or only after confirming a warning dialog.

A currently known problem is missing recommended fix information for constant radius arc procedure legs in MSFS navdata.

See also Search Procedures and Procedures for more information.


Navaids from the X-Plane user_nav.dat and the user_fix.dat files do not show up in Little Navmap

LNM reads both the the user_nav.dat and the user_fix.dat files. The problem is that the navaids are hidden by Navigraph data per default. Therefore, you have to switch to Do not use Navigraph database in the menu Scenery Library to see the user navaids.

You also have to reload the LNM scenery library after adding or changing the user files.

The user navaids can be used in the X-Plane stock FMS and GPS. But keep in mind that the user navaids do not show up on the X-Plane internal map.


User Interface and Windows

How can I make the map window bigger

there are several options:

  • Close the search window and/or close search options in airport search (three lines or “hamburger” button). These take a lot of space.
  • Undock the search window, i.e. remove it from them main window and/or close it. Normally not needed while flying anyway. I have it only open for flight planning.
  • Undock the map and move it to another screen if available.
  • Take the search window and drop it on the progress window. This will create a window with search and progress tabs at the bottom.

Here are some tips for undocking (Ctrl-key, etc.) and moving around in the interface: User Interface - Dock Windows


How can I make the map window larger

The issue is similar to the one above.

It’s usually the search window which keeps the map from expanding. Disable all unneeded search options in the “hamburger” drop down menu on the top right in the airport search. Do the same for navaid search.

Additionally undock the search window and let it float. Since the search is usually only needed for flight preparation you can close the search dock window when flying (Alt-1). You can always open it quickly by hitting F4.


I cannot resize a dock window

Freezing dock windows. Try one of the following:

  1. Main menu -> Window -> Reset Window layout
  2. Double click on a window title to undock it, i.e. bring it into floating state. Double click again to put it back. Resizing should be allowed now.

Another reason can be the search window taking up too much space:

  1. Switch around in the search tabs or undock and dock one back by double clicking into the title bar.
  2. Undock the search window and let it float. This dock window is very expansive and squeezes other docks into the corners even when search options are disabled.


Map Display

The map moves jerky or I see stutters in Little Navmap while scrolling or zooming

You might have selected too many details. Go to main menu -> View -> Details -> Default Detail.


Lines disappearing

Parts of the flight plan disappear.

This is a known error and can happen at certain zoom distances with long flight plan legs.


I cannot remove a traffic pattern, a holding or measurement lines

You have to right-click on the hotspot.

See User Manual - Mouse Click Hotspots.


Map is fuzzy and not updating

This can have several reasons:

  1. The server for the online map is down. These are free services where I have no influence on availability. Wait a few hours and they are usually back.
  2. You are using offline mode. This shows a red Offline warning message in Little Navmap’s status bar. Disable offline mode in the file menu. See Work Offline.
  3. Your internet connection is broken or your firewall forbids network access for Little Navmap.


The map has a grayish or dark background when zooming in

You use an online map and have hillshading enabled where it has no coverage. Disable hillshading (Show Hillshading) or use another theme.


Why isn’t the terrain mesh shown far North and South?

I installed the Global mesh for LNM, but still nothing far North and South?

The GLOBAL elevation data is only for the elevation profile and altitude display in the status bar. Hillshading comes from an open server and that has known limitations and bugs. Coverage is limited. You can use another map theme which includes worldwide hillshading like the StamenTerrain or OpenTopoMap.


Map background is black

Something went wrong when installing Little Navmap. Most likely the directory data is missing.


Apple macOS

Can I run the program on another client computer across the network

Yes. You can even mix different systems like using macOS for Little Navmap and Windows for flying. The client computer does not need a SimConnect or simulator installation at all.

See User Manual - Network Setup in the manual.


Can I see the program when running FSX, P3D, MSFS or X-Plane fullscreen

You can not. But you can:

  1. Use an old second monitor for the map before throwing it away.
  2. Take an old and slow notebook and use it in networked mode. Little Navmap is happy with 2 GB of ram and there are options to speed up map display. This notebook can run Linux or macOS. Have a look at the manual here: How to run a network Setup
  3. Run the simulator in seamless window mode. Then you can Alt+Tab between applications.


The map window is not visible or shows only a gray surface

This can happen for various reasons (like a crash) or if you change the option Allow to undock the map window in the options dialog.

Use menu Window -> Reset Window Layout in the main menu to clean up the window layout.


Where is the options menu item on macOS

Options can be accessed in the application menu Little Navmap -> Preferences.


I get a message complaining about an unidentified developer on macOS

First move the extracted archive out of the folder Downloads. Then right click or Ctrl+Click on the application and select Open. Confirm the dialog to run the program.

You probably have to enter an administrator name and password once. The program can be started normally after this procedure.

See User Manual - Installation - macOS.


Cannot run Little Navmap or Little Xpconnect on macOS Catalina

A new security feature in macOS forbids the execution of unsigned libraries or apps.

See User Manual - Installation - macOS.


X-Plane and Little Xpconnect

I installed Little Xpconnect but cannot find it in the X-Plane menus

Little Xpconnect does not create any menus items in X-Plane. Installation was successful if you can find Little Xpconnect in the plugin information of the X-Plane plugin manager.


A pop up window says my versions are not compatible Little Xpconnect needs to be updated

Pop up window says my versions are not compatible and I need to upgrade Little Xpconnect despite having the latest Little Xpconnect installed.

There is probably an old version of Little Xpconnect installed wrongly somewhere in your X-Plane plugins path. Maybe it was installed accidentally in the plugins base path without the Little Xpconnect folder structure.

Check if there is a another folder with the Little Xpconnect executable (win.xpl, mac.xpl or lin.xpl depending on operating system) around or if the file is stored in the plugins folder on the top level.

You can see the path of the (wrongly) loaded plugin in the X-Plane plugin manager.


Weather in X-Plane does not match what Little Navmap displays

The X-Plane weather interface is very limited.

Little Navmap can only read the X-Plane weather file METAR.rwx and display only the nearest weather report for an airport in some cases.

There is no information available how and if X-Plane interpolates weather between stations. Therefore, nearest weather and even station weather might not match.


I get an error message about missing directories when loading X-Plane scenery

You have Read inactive Scenery Entries: disabled in the scenery loading dialog and X-Plane’s scenery_packs.ini contains stale entries. Fix this by restarting X-Plane which will remove the old entries.

You might as well enable Read inactive Scenery Entries: which will cause Little Navmap to ignore scenery_packs.ini and read all. See Load Scenery Library Dialog.


Airports missing in X-Plane scenery after reloading

If you have Read inactive Scenery Entries: enabled: Restart X-Plane so that it can update the scenery_packs.ini.

See Load Scenery Library Dialog.


I still see an older AIRAC cycle in the Scenery Libary menu for X-Plane

You have to reload the scenery library in Little Navmap after updating the navdata in the simulator. Little Navmap will show the correct cycle and navdata after reloading.


Little Xpconnect does not load in Ubuntu 18.04 or derived Linux distributions

The problem is caused by a missing library. You can install this manually.

libicu55 was supported until Ubuntu 16.04 Xenial, but it is compatible with 18.04 Bionic as well.

Add the following repository and install the package

sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
sudo apt-get update
sudo apt-get install libicu55

Thanks to Wolfgang for the tip!