OpenROAD 0.9.0 d03ebfc244
This program is licensed under the BSD-3 license. See the LICENSE file for details. 
Components of this program may be licensed under more restrictive licenses which must be honored.
Error: cannot open '/.openroad'.
Warning: /home/xrex/usr/devel/pdks/sky130A/libs.ref/sky130_fd_sc_hd/lib/sky130_fd_sc_hd__tt_025C_1v80.lib, line 31 default_operating_condition tt_025C_1v80 not found.
Notice 0: Reading LEF file:  /project/openlane/chip_io/runs/chip_io/tmp/merged_unpadded.lef
Notice 0:     Created 13 technology layers
Notice 0:     Created 25 technology vias
Notice 0:     Created 482 library cells
Notice 0: Finished LEF file:  /project/openlane/chip_io/runs/chip_io/tmp/merged_unpadded.lef
Warning: LEF master sky130_ef_io__gpiov2_pad_wrapped has no liberty cell.
Warning: LEF master sky130_ef_io__corner_pad has no liberty cell.
Warning: LEF master sky130_ef_io__vccd_lvc_pad has no liberty cell.
Warning: LEF master sky130_ef_io__vdda_hvc_pad has no liberty cell.
Warning: LEF master sky130_ef_io__vddio_hvc_pad has no liberty cell.
Warning: LEF master sky130_ef_io__vssa_hvc_pad has no liberty cell.
Warning: LEF master sky130_ef_io__vssd_lvc_pad has no liberty cell.
Warning: LEF master sky130_ef_io__vssio_hvc_pad has no liberty cell.
Warning: LEF master sky130_fd_io__top_xres4v2 has no liberty cell.
[INFO] Using the set CORE_AREA; ignoring core margin parameters
Info: Added 1899 rows of 7776 sites.