Hi, I want to know if openlane supports on-the-fly configuration changes. For instance: for a design, say picorv32a, I chose my 

FP_CORE_UTIL

 as 50 (in ../picorv32a/config.tcl) and then I do till run_floorplan stage (in interactive flow) but now I want to change 

FP_CORE_UTIL

 to 60. So in this case, post modifying config.tcl, do I need to run from the beginning of flow or just running run_floorplan again take 

FP_CORE_UTIL

 as 60 ? Because the latter isn't updating my config.tcl (../openlane/designs/runs/_date_/config.tcl).

Yes, you can do that. If you'd like the new value to be logged in the config.tcl file under the run tag, use

set_log

instead of

set

while setting

FP_CORE_UTIL

.

Thanks @Ahmed Ghazy..will try and let you know