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The update to 3.2 with dm_tool 2.3 was smooth but then I tried to transfer some OFFIMG files and it hung. The DM42 was unresponsive, stuck in USB disk mode, but not anymore recognized by Windows. I had to reset it with a paperclip, then everything worked fine and I was able to transfer the images.
I just had the exact same issue occur; was just coming here to report this and saw Didier's note.
Initially the USB drive connected, then before anything was transferred, it just disconnected (on the PC side - the drive window closed) but the DM42 was frozen in the connected state. The DM42 would not respond to the [EXIT] key. I disconnected the USB cable, and pressed reset with a paperclip. The About screen appeared, and then the DM42 was OK. I then connected again and had no trouble copying files to the USB drive, deleting files on the drive, etc. All seems OK now.
The update to 3.2 with dm_tool 2.3 was smooth but then I tried to transfer some OFFIMG files and it hung. The DM42 was unresponsive, stuck in USB disk mode, but not anymore recognized by Windows. I had to reset it with a paperclip, then everything worked fine and I was able to transfer the images.
Same issue here. In my case, after activating the USB drive, it was completely empty. I ejected the drive from Windows, but the EXIT key was unresponsive and required a reset with a paperclip. After disconnecting the USB cable, reconnecting and starting the USB drive, all of the drive's contents were again available.
Thanks, updated fine...Nice "31st anniversary of the HP 28C" gift, the HP28C was released 1-05-1987. I bought my HP Prime exactly 1 years ago on 1-05-2017.
I had the same problems as described in this post.
Also a reformat of the usb-disk was again the solution.
DM41X beta: SN00018.
DM41X: SN00496.
DM42 beta: SN00074.
DM42:SN06020.
DM42 converted to C47 SN08973
DM10L: SN056/100.
DM11L: SN 02058.
DM15L: SN2074.
DM16L: SN2156.
DM15, DM16, DM41
and a whole bunch of the original HP's,