USING NUCLEO 429 ZI , The program pass Build, Debug ,But when clicking RUN there is a message , Break at address "0x120124" with no debug information available, or outside of program code.

[RKore.1]

there is a possibility to click view disassembly , when clicking there is alot of lines that look like

681b0c86:  movs  r0, r0

681b0c88:  movs  r0, r0

681b0c8a:  movs  r0, r0

681b0c8c:  movs  r0, r0

681b0c8e:  movs  r0, r0

681b0c90:  movs  r0, r0

681b0c92:  movs  r0, r0

681b0c94:  movs  r0, r0

681b0c96:  movs  r0, r0

681b0c98:  movs  r0, r0

681b0c9a:  movs  r0, r0

681b0c9c:  movs  r0, r0

681b0c9e:  movs  r0, r0

681b0ca0:  movs  r0, r0

[Markus GIRDLAND]

When you say the project pass Debug but not clicking Run do you mean the Resume button in the Debug perspective or the green circle with a white arrow in it when you Run the application?

Also, try to rebuild the project and also use STM32CubeProgrammer to mass erase the flash memory in order to make sure that what is on the target is actually what you expect to be there.