System Workbench for STM32

Hi
Thanks for the suggestions. I checked and don't have any break points set, cleaned the project, wiped the board etc, still no luck. I also have a Nucleo board and debug was working on that last night. I just closed the project and now can't get debug to work on either board tonight. The error for the Nucleo board project is:
Error with command: gdb --version
Cannot run program "gdb": Launching failed

This one was working yesterday.

The error for the L476 Discovery board today is:
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 join a drive to a directory on a joined drive.
localhost:3333: The system tried to join a drive to a directory on a joined drive.

For both boards I do create the .bin and .elf file and STM32 ST Link will load the board and execute.

The next thing I can try is start from a clean slate, new project and see if I can change the behaviour but when it works one day and not the next not sure how much time I want to invest. It's a shame because ST has given me at least 4 of the various boards and the hardware seems interesting.