Command_core: ERROR(spawn error)

When installing cryoSPARCv2.12.4, I came across such an error:

Starting cryoSPARC...

Starting cryoSPARC System master process..
CryoSPARC is not already running.
database: started
command_core: ERROR (spawn error)

As I used cryosparcm log command_core, the log told me the following message:

Traceback (most recent call last):
File “”, line 1, in
File “cryosparc2_command/command_core/”, line 55, in
import core
File “cryosparc2_master/cryosparc2_command/command_core/”, line 2, in init cryosparc2_command.command_core.core
ImportError: No module named Crypto.PublicKey

The status show as below:

CryoSPARC System master node installed at
Current cryoSPARC version: v2.12.4

cryosparcm process status:

app STOPPED Not started
app_dev STOPPED Not started
command_core FATAL Exited too quickly (process log may have details)
command_proxy STOPPED Not started
command_rtp STOPPED Not started
command_vis STOPPED Not started
database RUNNING pid 24248, uptime 0:03:33
watchdog_dev STOPPED Not started
webapp STOPPED Not started
webapp_dev STOPPED Not started

It seemed the files missing?

ls cryosparc2_command/command_core/ init.pyc

How can I solve this problem? Any advice will be appreciated.

Hi @wangxue,

Can you reinstall cryoSPARC: