FAQ

From Jmri

This FAQ should be the first place to check for answers to your questions. Many times the answer is hidden in the mists of our Yahoo group archives. Hopefully this page will help clear that mist!

How can I upgrade?

Every release of JMRI is carefully tested to try and ensure compatability with previous releases. To quote Bob:

Backups are always good!!

Your config files, roster, etc, are stored in ~/Library/Preferences/JMRI (That's your own Library folder, in your home directory) If you make a copy of that, you've got everything that might get damaged if something Really Bad happens. But nothing like that is _supposed_ to happen; since JMRI 1.0 all formats have been (and will be, I hope) backward compatible. Note that they're not _forward_ compatible; if you create a new panel in N+1, you might not be able to read it in version N (or you might, there are just no guarantees)

For upgrades go to http://jmri.sourceforge.net Save and run the version appropriate to your computer.

No Loco Detected

With thanks to Paul Bender for the following notes:

Basically, the error "no loco detected" means that the decoder didn't respond when the command station sent out the programming request. On a Lenz system, this is the same as getting an "Error 2" when programming from a hand held throttle.

One possible cause of this is that the CV requested isn't actually defined in the decoder. See if you can read the problem CV using a hand held throttle. If you get the same result on the handheld, then the CV may not actually be defined.

This message may alsoresult from a bad connection betweeen the locomotive and the track --(dirty track, dirty wheels). Try moving the loco by hand to determine if the problem will resolve itself. Clean the track and clean the loco wheels.

Timeout talking to command station

This message is saying that your command station and JMRI are not communicating. Typical causes are incorrect 'com' port settings, baud rate, and other arcane H/W stuff that is discussed in, at present, various different places unfortunately. If the program is starting up, but the programming options are 'greyed out' the JMRI Preferences setup page may be able to help.