Preenfm2 freeze when saving config

[cristiansubrero]

Hello, i've build a new preenfm2 but I have a problem.
Whenever i try to save the config (i have to change encoder from 12 to 24) the preenfm freeze and the only thing to do is to reboot. I cannot save config.
I have 2.03o firmware but i have tried with other firmware. I have tried to change usb stick too. Any help it's appreciate.

[cristiansubrero]

I have double check if there are any bad solder point, but everything it's ok.
If i connect the preen to my mac i won't recognize as mass storage. But if i connect directly the usb stick is ok.

[Xavier]

Seems like your preenfm2 cannot communicate with your USB drive.
Try to reformat it under windows and put back the pfm2 files.

What usb stick do you have ?

Xavier

[cristiansubrero]

Hello Xavier, i have a cruzer that come with the kit. Now i try to reformat the usb as suggested.

[cristiansubrero]

I have formatted another usb stick and put back pfm2 file and now it works. Unfortunately with the cruzer this trick don't work. Thank you so much Xavier.