Hi, I am creating a design that has ring oscillators (so i expect comb/logic loops in my design), synthesis is correctly detecting the loops and flags them as errors. With these errors, I am not able to advance further in the flow, is there any way to "waive" these errors (or disable this check) as to allow the flow to continue?

hello. you can try and set the following variable to false

ERROR_ON_SYNTH_CHECKS

Hi Farid, thanks for the reply, would that be on the openlane json or somewhere else?

yes

got it thanks.