newRPL - build 1255 released! [updated to 1299]

[JoJo1973]

I've not been able to operate a USB transfer with my HP50g: that's the procedure I followed (firmware 1255 on the calc, firmware 1255 on the emulator)

1) I start the emulator and plug the calc: the transfer indicator lights up and USBSTATUS returns #3h, without need to type USBON
2) "Hardware/USB Connections" on the emulator: the calc is recognized, appears in the list and the "RX" indicator on the emulator's screen flashes.
3) Selecting the calc and pressing OK estabilishes the connection: USBSTATUS returns #0h
4) I type USBON on the emulator, the indicator lights up and USBSTATUS returns #3h
5) I type 30 USBRECV on the emulator and try to USBSEND an object: nothing happens and sometimes the emulator locks and I need to kill it. Other times the transfer silently fails.
6) Sending an object from the emulator to the calc using the reverse procedure fails either.
7) "Hardware/Remote USBARCHIVE to file" brings a dialog box to choose where to save the backup, but then fails: an "USB communications error" pops up, "USBAUTORCV error: Received invalid data" on the emulator and (not all the times) "~INVALID~" object on the calc.