Unplugged target or STLink already in use or STLink USB driver not installed Posted by tarek bouchkati on 2018-07-12 11:45 Hi, Unfortunately System Workbench does not support ST-Link V1. So it is better to get an ST-Link V2. Hint : if you have another NUCLEO board, you could use its embedded ST-Link V2-1 as standalone debugger. Regards, Tarek