System Workbench for STM32

Hi Laurent,
You're right, i'm trying to flash without reset line.

Finally, i have beaten my problem. That error occured due to bad st-link configuration.
I clicked "User Defined" configuration script in run config and manually changed it following way:

set CLOCK_FREQ 1800
reset_config none

I know it's trick to manually change config file, but It's works fine.
Thanks.

Best regards,
Alex