GDB server

[zom]

What should I do when stm32 applications do not see st-link and the message I always receive is: Failed to start GDB server
Failed to start GDB server
Error in initializing ST-LINK device.
Reason: (2) ST-LINK DLL error.

No matter which stm32 board or cable I took result the same.

[TDK]

Perhaps a firewall issue.

Can STM32CubeProgrammer connect? OS? Software version?

[zom]

STM32CubeProgrammer does not connect. Windows10. Software - latest.

[TDK]

Okay, so not a GDB specific issue.

Can STM32CubeProgrammer see the programmer? Does it show a serial number, firmware version, voltage, etc? Does it show up in the device manager?

What board(s) are you trying? What programmer do you have? Are these custom boards?