Hey,
After installing the whole pdk and openlane I've tried the examples such as SPM and the whole flow worked flawlessly; however, when I tried some other designs, as a small MAC, I've got some errors while doing the "detailed placement". Those were surpassed by tweaking FP_CORE_UTIL and PL_TARGET_DENSITY variables. My question is: I've seen that the standard designs (that come with openlane, e.g., SPM) don't have those variables defined on their config.tcl, so, does openlane need more effort while doing smaller designs?
Cheers