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Users are invited to search this page for problems they may have encountered and to add new problems in the New bugs section.

The page is a little random at present. I will try to find time to organise it better - probably by phone type.

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Known bugs

No known bugs in v.1.2.4 at launch but I found a new one soon after :-(. Having enabled voice notes in .amr format (as well as the original .wav) allowing me to test this feature on my phone, I found that recording audio as well as taking a photo when marking a new wayplace prevented the user saving the wayplace and returning to the map/GPS screen unless the place name was changed. This is now fixed along with a couple of other weaknesses in the place code. It's a fairly minor bug fix so I haven't incremented the version number. The fixed version is on the website from today (3 June). Note that if you add audio or a photo to a place/wayplace when you create it, you need to edit the place name first as any changes after you add the audio/photo will be ignored (you can always rename the place later which will automatically rename the audio/photo files). --Elvin 10:37, 3 June 2008 (UTC)

Version 1.2.4 fixes the following bugs:

  • Photos and voice notes are not deleted when the associated place is deleted, and GPX files are not deleted when a track is deleted. These minor problems will be fixed in the next release which will have improvements to tile loading and storage. In the meantime, use your phone's file manager to delete unwanted files from the mom folders. --Elvin 14:14, 21 May 2008 (UTC)
  • In one session, having traced and logged using GPS, then stopped tracing and moved the map to another area to show went well, up to the moment that I zoomed in. Then the blue dots of the trace showed up on the new area (which was by then in the middle of a wood). Will try to give you a log to check out. Sebastiaan 11:40, 8 May 2008 (UTC)
This is an example of a persistent problem in the tile loader algorithm. Most of the time it works fine but it is possible to fool it into showing a tile in the wrong place. Version 1.2.4 with an improved loader, fixes for the other known bugs and a couple of other small changes is being tested and should be posted soon. --Elvin 10:08, 27 May 2008 (UTC)
  • Some phones (eg. Nokia N95-8GB) will not save photos
Really? What have other N95 users found? Can you send me a diagnostics report? --Elvin 16:25, 20 August 2008 (UTC)
I had this occur once with Nokia E71, I took a photo but I didn't find it after the trip. When I tried a test case, though, the photo did get saved, though it was a .jpg by name but the content was PNG in fact. --Jkp 12:30, 23 August 2008 (UTC)
Yes, some/all Nokias save photos in png format by default. I have changed mom to suit and the latest files are available for download. --Elvin 15:32, 27 August 2008 (UTC)

New bugs

Please report new bugs so that they can quickly be identified. Please also sign them.

  • It was not possible to add audio notes to existing places/wayplaces. This has been fixed in the files available for download from today (27 August 08). This update also fixes discrepencies between jpg/png photo files on Nokias. --Elvin 15:35, 27 August 2008 (UTC)
  • Sometimes an 'unhandled exception' shows up after about 4 points of tracing. Could not pinpoint it down to a specific handling so haven't got a clear log for you yet. Sebastiaan 11:40, 8 May 2008 (UTC)
  • I didnt get mom to work. Ive using a Nokia 6270 which meets the requirements. But when I start the bluetooth-version Ill get an error "Security java/lang/SecurityException Access denied". I also installed two other applications (gpsj and gpslog) which worked with my bluetooth mouse. --MichaWill 14:08, 27 May 2008 (UTC)
If you haven't already, select mom in the applications list and choose the 'permissions' option, then ensure Bluetooth is allowed. this is local connectivity>never ask on my phone but the wording may be different for yours. --Elvin 11:52, 30 May 2008 (UTC)
  • I get "stuck" in the Settings menu. Selecting "Done" doesn't return me to the previous menu, and none of the other keys on my Sony Ericsson K550i have the effect of leaving the menu. --Graham C 13:43, 2 June 2008 (UTC)
I use a Sony Ericsson myself (W880i) which has a similar Java spec to the K550 so this is surprising. Most SE phones (until the very latest models) have a BACK button (returning arrow symbol below left soft key) which should have the same effect as 'Done' and should return to the More.. menu. Please go into Settings and select diagnostic reports. If you can't get out, crash out of mom by holding the BACK key down or pressing the activity menu key (screen-swap symbol on the right) and ENDing the app. Then start mom again and repeat this procedure. This time, you should have diagnostics file in the /mom/ folder on the memory card. Please email this to me ( and I will try to diagnose the problem.--Elvin 10:53, 3 June 2008 (UTC)
I should mention that I don't actually have a memory card for my phone (I hadn't spotted the "requirement" until now, but I don't see why it should be necessary when my phone has 64MB storage built-in). I can't find any diagnostic menu, all I have in the Settings menu is "options", i.e. full screen through to GPS compass. --Graham C 19:18, 3 June 2008 (UTC)
MIDlets cannot (as far as I know) save files to the phone memory - only to memory cards. With a memory card installed you should be able to go to More...>Settings to check 'diagnostics reports' at the bottom of a list (unnecessarily ;-) titled 'options'. --Elvin 10:20, 23 June 2008 (UTC)
That's funny, because other software (e.g. TrekBuddy) has no trouble writing to the phone memory. I believe this is at C:/ on my phone. --Graham C 16:46, 7 July 2008 (UTC)
  • I have an SE G900 (Symbian device) and when I try to start Mom it tries to access E:\mom. The G900 do not have an E: drive hence the application terminates. The memory card is mapped to the D: drive. Boghammar 17:59, 29 June 2008 (UTC)
Interesting! Every phone I have tried refers to the memory card as drive E: so I hard-wired this into the code to simplify the user interface. I'll look at the idea of popping up a list of available drives if E: is not found. Elvin 14:59, 30 June 2008 (UTC)
I think I'd use "FileSystemRegistry.listRoots()", then choose the last one - I'd guess the last item in the enumeration is most likely to be any flash card present. Flint 08:20, 28 August 2008 (UTC)
  • I use a Nokia N70. I tried to install mom 1.2.4. The installation progress bar runs to its end. Then I got the error message "Authorisation failed" (Original in german: "Authorisierung fehlgeschlagen"). Mom doesn't appear in the program list. I sucessfully installed Trail Explorer 1.10.0 with no problems. -- DarkTranquility 02:02, 16 July 2008
  • I got the same installation problem (Autorization failed/Authorisierung fehlgeschlagen) on my Sony Ericsson G900. I made sure all possible rights are granted to Java before. Any clue? Seems to be a common problem here. I would be happy to do some debug testing for you. MD 22:52, 2 December 2008 CET
Problem solved on my G900: The manifest file of the JAR (and probably also the JAD) should contain "MIDlet-Permissions-Opt" and not "MIDlet-Permissions". To change this manually until there is a fix: extract the file MANIFEST.MF from mom125.jar (a JAR file is just a ZIP) and change the permission property. Then just put back the file into the JAR and run it on your device... In any case now I run into the E: drive problem mentioned above for another G900. MD 11:55, 6 December 2008 CET
  • I use a Nokia E90 : seems to work but continues every second to request permission for using (internal) GPS data. Other prompts have disappeared. Has the right java versions. Also seems not to be able to use the large screen correctly, but i am not sure about that, as it got stuck in the GPS problem.--GertGremmen 13:45, 14 August 2008 (UTC)
Problem solved on my E65: Use the "Program Manager" to edit the setting for MOM´s "Suite-Settings" (option menu). Setting should be something like "ask only once" (I have got a German phone). --Guido 13:00, 29 August 2008 (UTC)
  • I also have a Nokia N80: refuses to install, I got the error message "Authorisation failed". I authorized install for all software.--GertGremmen 13:45, 14 August 2008 (UTC)

  • Nokia 6230i - I can't set the default app accesss to allowed for the phone to read user data and add/edit data. Always allowed is greyed out. Access for bluetooth can be set to always allowed however. I set phone access to ask every time, it asks me 3 times when I run the app (i press allow each time) then crashes. Error is Null Pointer java/lang/NullPointerException. App is installed to a MMC card --LeedsTracker 18:16, 14 August 2008 (UTC)
    • Nokia 5300 - seems the same: can't set up write/read permissions for the application. "Access denied" at run. -- Nzeemin 10:52, 16 December 2008 (UTC)
  • SE K610i - Works fine apart from the info screen (speed, distance, height etc) and compass freezes after about 10 seconds when GPX logging. The map screen continues plotting and responding the track and the GPX file is recorded correctly. --tommg 16:50, 7 September 2008 (UTC)
  • Nokia 6110 Navigator - works fine until just stops updating the GPS position. Starts to work again after exiting and restarting the program. Just stopping and restarting the GPS within the program does not help. --Softone 22:00, 26 September 2008 (UTC)