System Workbench for STM32

I'm sorry, I selected STM32F103VCTx of course. The rest of type string is not interesting in my opinion because describes mcu package. It is not related to debug configuration:)

So, your guide works for me for STM32L Discovery board (st-link v2 and built-in mcu).

Then, I made a progress with my custom board. The openocd script was missing in debug configuration. I created my own related to my board:

source [find interface/stlink-v2.cfg]
source [find target/stm32f1x_stlink.cfg]
# use hardware reset, connect under reset
reset_config srst_only srst_nogate

I received next error message:

Error in final launch sequence 
Failed to execute MI command: 
load ""

Error message from debugger back end: 
Error erasing flash with vFlashErase packet 
Error erasing flash with vFlashErase packet

I found a forum topic dealing this issue. When I tried change reset_config to none received error message:

Error in final launch sequence
Failed to execute MI command:
-target-select remote localhost:3333

Error message from debugger back end:
localhost:3333: The system tried to connect the unit to the directories on a drive attached to them. (Translation from my native language!)

In the same topic it is noted the problem could be caused by openocd version with a bug (1.6). So, I revert to openocd version 1.3 and no changes. Next change of reset_config configuration did not provide additional progress.