JMRI Randomly or Intermittently Stops Working

I have come across a glitch in JMRI that seems to be tripping up a lot of people. It happens at random times even after you have been using it just fine. Can also happen when you install and setup JMRI for the first time but with NO HARDWARE connected.

What happens it that since JMRI sees no hardware it sets your connection defaults to "Internal" This setting is for testing JMRI WITHOUT HARDWARE. 

This setting can also get changed randomly even after you have JMRI installed and running ok.


Bottom line of Decoder Pro window should look like this:

If it says "Internal" instead of "NCE" That is incorrect!

Fortunately, it is very simple to check and fix.

From the regular Decoder Pro All Entries screen go to:  Edit / Preferences /  Defaults.

all of the selections MUST BE set to NCE not internal. correct them as needed then click save.

exit out of JMRI, close out everything running, and reboot your PC. Also power cycle / reboot your NCE equipment.

That's it!   Let me know if this works. 




A few points of interest:

 On the USB board make sure all the jumpers are off. in other words hanging on one pin only, or removed completely


FYI- the LEDS only come one when transmitting data, if one or both are on that is an indication of the problem. The USB board must show up in device manager under ports and have the same COM port number listed in JMRI.The COM port number AND speed settings in JMRI must match the settings for the COM port as shown in the Windows Device Manager. There is a known JMRI issue in the connection settings to “internal” instead of “NCE” please look VERY carefully at the two status lines on the bottom of the Decoder Pro Screen.

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