We are very pleased to announce that the 4.11 series of JMRI test releases has resulted in a version that's good enough to be recommended for general use, including by new users. We're therefore making that version, "Production release 4.12", available for download today.

Note: this version of JMRI, along with future ones, will require that you have Java 1.8 or later.

There have been hundreds of updates, new features and bug fixes since version 4.10 came out six months ago. For more information, please see the release note:

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The release note also contains the download links for Mac OS X, Linux and Windows. (That's our subtle way of trying to get you to read the note).

Note that JMRI is made available under the GNU General Public License. For more information, please see our copyright and licensing page.
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If you use JMRI on Linux or Mac and are updating from JMRI 4.7.3 or earlier, there’s a necessary migration step. (Not needed on Windows or if updating from something more recent) Please see the release note for details: <>

Bob

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Bob Jacobsen
jacobsen@...?+1-510-708-5988 AIM, Skype JacobsenRG