Breakpoints do not work with CortexM4 Fast Model


using ARM DS 2021.2, I am unable to put breakpoints on code running on the Cortex M4 Fast Model 11.15

I did some tricky things with the R52 Fast model by using the debugger command : 

add-symbol-file "${workspace_loc:/startup_Cortex-R52/startup_Cortex-R52.axf}" N:0

This allowed me to use breakpoints on code running in EL0 (User) mode.

But what is the equivalent command for enabling breakpoints for M4 C Code running on Privileged or User mode ?

This is described nowhere in the ARM DS documentations.

Best Regards

Frederic HUGUET