I have about 1000

illegal overlap

. By grouping them (merging adjacent boxes), I have about 55 larger boxes. Most of them appear on a metal 5 strips in macros that are merged with the top-level strips. The others appear in macro that don't use metal 5 (checked with grep). TL;DR I think my project is OK wrt this issue. But that's only manual inspection.

Looking at your design, I also haven't seen any issues. The only way to verify for sure that it's not causing issues is by running

make -f /path/to/caravel_develop/Makefile lvs-user_project_wrapper

using the latest Makefile we have in the caravel repo on the develop branch. This will run hierarchical LVS and will reveal shorts provided that you have all

mag/

views of all of your blocks. Of course, make sure to

make uncompress

everything using your Makefile first.

Ok. I didn't find any issue related to metal5.