Can't update variable address

[Eplankton]

I have an elf file compiled under arm-gcc, and there's a global variable extern "C" volatile uint32_t os_ticks in the code, however when i try the viewer by the instructions, after click the update button and a black cmd window showed off, nothing changed, so I check the disassmeble of elf and didn't find any symbol like os_ticks, is that a problem?

[Eplankton]

Already solved. Please add a description in the README that tells everybody the GDB version must >= 12.1

[klonyyy]

Actually it's already in the README, maybe I should put it globally (now it's only in Windows section) or add a check in the STMViewer itself, which seems the best option.