@Mitch Bailey @mehdi @Jianwei Jia Hello Mitch, We are working on LVS. We are now getting issues on the HEADER cell. The correct HEADER cell can be found in the file included using .INCLUDE sky130_fd_sc_hd.spice (I have attached below, HEADER definition is at line 18413) , but the extracted spice file has 6 pins (instead of 4) for the HEADER. I am including the spice file, final GDS file, the gds file just for the HEADER, and the commands we are using for lvs. Thank you.