I am facing Pre-check XOR failure with latest MPW-6 openlane. From the .gds review it's look like there is shift in core ring. From difference MPW-5 & MPW-6 in config.tcl has difference in default PDN CORE ring offset value. In MPW-5 config.tcl set ::env(FP_PDN_CORE_RING_HOFFSET) {52.400000000000006} set ::env(FP_PDN_CORE_RING_VOFFSET) {52.400000000000006} In MPW-6 config.tcl set ::env(FP_PDN_CORE_RING_HOFFSET) {14} set ::env(FP_PDN_CORE_RING_VOFFSET) {14} Any one noticed similar issue with pre-check?

Not yet

Look like there is major change in PDN logic in MPW-6. Is efabless team done tried any trial user pre-check and tapeout flow with mpw-6c tag ?

I just checked with a basic design and it seems fine

@Matt Venn I am picking the latest openlane + openroad tool sets, Matt Liberty replayed saying there is change in PDN concepts post mpw-6b. I am discussing with him in openroad channel.

ok

Did you manage to resolve this issue? I am also getting an XOR failure in the pre-check.

if it's due to a missing file, try on the efabless site

@Dinesh A did you resolve your issues?

@jeffdi This issue seen with latest openlane & openroad toolset not with mpw-6c tools. With config and PDN script changes the issue is resolved now with latest tool flow. Here the thread on discussion with openroad team https://skywater-pdk.slack.com/archives/C0161A4A59V/p1652981163259559

ok to use it if it works. we’ll update the tag for the next shuttle.