#151 dfu-util: Lost device after RESET?

[Patrick]

I am trying to load the BMP (blackmagic probe) firmware on my Bluepill, but I'm encountering a problem when I try to flash it with the DFU-firmware Upload.
I'm using dfu-util 0.11 and macbook air Monterey 12.6.1

error:

MacBook-Air-Patrick:src patrickflisnik$ sudo dfu-util -a 0 -s 0x08002000:leave:force -D blackmagic.bin
dfu-util 0.11

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

dfu-util: Warning: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release
Opening DFU capable USB device...
Device ID 1d50:6018
Run-Time device DFU version 011a
Claiming USB DFU (Run-Time) Interface...
Setting Alternate Interface zero...
Determining device status...
DFU state(0) = appIDLE, status(0) = No error condition is present
Device really in Run-Time Mode, send DFU detach request...
Device will detach and reattach...
dfu-util: Lost device after RESET?

[Tormod Volden]

Please see https://sourceforge.net/p/dfu-util/tickets/new/ for important information you will have to provide. In addition, which bootloader is on your BluePill?