Hey everyone. I'm trying to get an HDL design running through the to-do list to get a hardened design for caravel. I've managed to get the caravel and openlane repos up and working. Everything is made and installed, and seems to be functioning. At the run_placement step in this guide (https://github.com/efabless/openlane/blob/master/doc/advanced_readme.md), I am seeing errors. Specifically, in the file at 

/openLANE_flow/scripts/openroad/or_opendp.tcl

 on the line 29 (

detailed_placement

) The placement tool is giving me 7,602 "overlap check failed errors" These are the Design Stats that are printed out to the command line:

Design Stats
--------------------------------
total instances         19008
multi row instances         0
fixed instances          3435
nets                    15641
design area          237626.7 u^2
fixed area             5193.7 u^2
movable area         127808.8 u^2
utilization                55 %
utilization padded        122 %
rows                      179
row height                2.7 u

My thoughts are that the issue is with that "utilization padded" number being greater than 100%. I am using all the default OpenLane settings, such as the sky130 hd cells.

Hi @Alex Underwood I had the same issues (and I kind of still do), but look at this thread for what I had to do. https://skywater-pdk.slack.com/archives/C016H8WJMBR/p1606794742487800

Thanks @Matt Aamold! I was able to get the rest of the flow working with the info in that thread.