pyOCD: NUCLEO_WB55RG erase fails

The same fail constantly occurs.

STLink version:

$ cat /mnt/pci-0000_00_14_0-usb-0_1_1_1_1-scsi-0_0_0_0/DETAILS.TXT 
Version: 0221
Build:   Aug 23 2019 16:24:56

Traceback:

$ pyocd --version
0.24.1
$ pyocd erase -vvv -u 066CFF313335415043204530 -t stm32wb55rgvx --pack ~/workspace/raas-daemon/cmsis-packs/Keil.STM32WBxx_DFP.1.0.0.pack --chip
0000331:DEBUG:session:Project directory: /home/raas/pyOCD
0000340:DEBUG:pack_target:Loading target 'stm32wb55ccux' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55ceux' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55cgux' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55rcvx' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55revx' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55rgvx' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55vcyx' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55veyx' from CMSIS-Pack
0000340:DEBUG:pack_target:Loading target 'stm32wb55vgyx' from CMSIS-Pack
0000350:INFO:board:Target type is stm32wb55rgvx
0000355:DEBUG:stlink:STLink probe 066CFF313335415043204530 firmware version: V2J35M26
0000356:DEBUG:sequencer:Running task load_svd
0000412:DEBUG:sequencer:Running task create_flash
0000412:DEBUG:sequencer:Running task pre_connect
0000412:DEBUG:sequencer:Running task dp_init
0000437:DEBUG:dap:Default wire protocol selected; using SWD
0000448:INFO:dap:DP IDR = 0x6ba02477 (v2 rev6)
0000464:DEBUG:sequencer:Running task power_up
0000522:DEBUG:sequencer:Running task find_aps
0000530:DEBUG:sequencer:Running task create_aps
0000530:DEBUG:sequencer:Running task create_ap.0
0000533:DEBUG:ap:Using accelerated memory access interface
0000533:INFO:ap:AP#0 IDR = 0x24770011 (AHB-AP var1 rev2)
0000535:DEBUG:ap:AP#0 default HPROT=3 HNONSEC=0
0000537:DEBUG:ap:AP#0 implemented HPROT=3 HNONSEC=0
0000541:DEBUG:sequencer:Running task create_ap.1
0000544:DEBUG:ap:Using accelerated memory access interface
0000544:INFO:ap:AP#1 IDR = 0x84770001 (AHB-AP var0 rev8)
0000546:DEBUG:ap:AP#1 default HPROT=3 HNONSEC=1
0000548:DEBUG:ap:AP#1 implemented HPROT=f HNONSEC=1
0000554:DEBUG:sequencer:Running task find_components
0000554:DEBUG:sequencer:Running task init_ap.0
0000569:INFO:rom_table:AP#0 ROM table #0 @ 0xe00ff000 (designer=020 part=495)
0000583:INFO:rom_table:[0]<e000e000:SCS-M4 class=14 designer=43b part=00c>
0000593:INFO:rom_table:[1]<e0001000:DWT class=14 designer=43b part=002>
0000601:INFO:rom_table:[2]<e0002000:FPB class=14 designer=43b part=003>
0000610:INFO:rom_table:[3]<e0000000:ITM class=14 designer=43b part=001>
0000619:INFO:rom_table:[4]<e0040000:TPIU-M4 class=9 designer=43b part=9a1 devtype=11 archid=0000 devid=0:0:ca1>
0000628:INFO:rom_table:[5]<e0041000:ETM-M4 class=9 designer=43b part=925 devtype=13 archid=0000 devid=0:0:0>
0000638:INFO:rom_table:[6]<e0043000:CTI class=9 designer=43b part=906 devtype=14 archid=0000 devid=0:0:40800>
0000638:DEBUG:sequencer:Running task create_cores
0000638:DEBUG:coresight_target:Creating SCS-M4 component
0000642:INFO:cortex_m:CPU core #0 is Cortex-M4 r0p1
0000657:INFO:cortex_m:FPU present: FPv4-SP
0000660:DEBUG:sequencer:Running task set_default_reset_type
0000660:DEBUG:sequencer:Running task create_components
0000661:DEBUG:coresight_target:Creating DWT component
0000666:INFO:dwt:4 hardware watchpoints
0000678:DEBUG:coresight_target:Creating FPB component
0000681:INFO:fpb:6 hardware breakpoints, 4 literal comparators
0000684:DEBUG:fpb:fpb has been disabled
0000698:DEBUG:coresight_target:Creating ITM component
0000708:DEBUG:coresight_target:Creating TPIU-M4 component
0000711:DEBUG:sequencer:Running task check_for_cores
0000711:DEBUG:sequencer:Running task halt_on_connect
0000711:DEBUG:cortex_m:halting core 0
0000714:DEBUG:sequencer:Running task post_connect
0000714:DEBUG:sequencer:Running task notify
0000714:INFO:eraser:Erasing chip...
0000714:DEBUG:cortex_m:halting core 0
0000717:DEBUG:cortex_m:set reset catch, core 0
0000717:DEBUG:cortex_m:halting core 0
0000724:DEBUG:cortex_m:reset, core 0, type=SW_SYSRESETREQ
0000745:DEBUG:cortex_m:clear reset catch, core 0
0000847:DEBUG:cortex_m:resuming core 0
0000847:DEBUG:manager:added=[] removed=[]
0000847:DEBUG:manager:bps after flush={}
0000879:DEBUG:cortex_m:resuming core 0
0000879:DEBUG:manager:added=[] removed=[]
0000879:DEBUG:manager:bps after flush={}
0000894:DEBUG:session:uninit session <pyocd.core.session.Session object at 0x7f3186bd9390>
0000895:DEBUG:board:uninit board <pyocd.board.mbed_board.MbedBoard object at 0x7f318a6c8ac8>
0000900:DEBUG:cortex_m:cannot resume: target not halted
0000908:CRITICAL:__main__:erase_all error: 536871425
Traceback (most recent call last):
  File "/home/raas/pyOCD/py3/lib/python3.5/site-packages/pyocd/__main__.py", line 344, in run
    self._COMMANDS[self._args.cmd](self)
  File "/home/raas/pyOCD/py3/lib/python3.5/site-packages/pyocd/__main__.py", line 505, in do_erase
    eraser.erase(addresses)
  File "/home/raas/pyOCD/py3/lib/python3.5/site-packages/pyocd/flash/eraser.py", line 76, in erase
    self._chip_erase()
  File "/home/raas/pyOCD/py3/lib/python3.5/site-packages/pyocd/flash/eraser.py", line 98, in _chip_erase
    region.flash.erase_all()
  File "/home/raas/pyOCD/py3/lib/python3.5/site-packages/pyocd/flash/flash.py", line 338, in erase_all
    raise FlashEraseFailure('erase_all error: %i' % result, result_code=result)
pyocd.core.exceptions.FlashEraseFailure: erase_all error: 536871425