I've put the USERSTACK in XRAM (C161 internal ram, 0xE000 to 0xE800) (cf AN Keil APNT_124 + U3 directive). The project work well and execution speed is improved (local variables in XRAM!). But, there is still a problem when working with the remote debugger under µV2 (MONITOR). It only works the first time after downloading the code. I need to restart the target after each break. Is someone overcome this problem ? (perhaps modifying monitor code like STARTUP modifications (cf release.txt §3.5) Thanks Gilles DUPLAY