I am trying to use USB port too, on STM32L496ZGT, USB Virtual Port Tx/Rx are working fine when debug separately. But always fail at __IS_SFU_RESERVED();main() --> SFU_BOOT_RunSecureBootService() --> SE_Startup(void) -->  __IS_SFU_RESERVED();I compa...

sorry, my mistake. It works fine after I deletes the old setting in Properties/C build/Settings/MCU GCC Linker/Miscellaneous\Additional object files,

I added postbuild.sh to SBSFU, Extract SE interface symbols1 symbol.listBut for user app, after I added INCLUDE se_interface_app.ld to STM32L476RGTx.ld...INCLUDE se_interface_app.ldINCLUDE mapping_fwimg.ldINCLUDE mapping_sbsfu.ld...and changes in Pro...