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/user_project_wrapper_empty/runs/user_project_wrapper_empty/tmp/merged_unpadded.lef
Notice 0:     Created 13 technology layers
Notice 0:     Created 25 technology vias
Notice 0:     Created 439 library cells
Notice 0: Finished LEF file:  /project/openlane/user_project_wrapper_empty/runs/user_project_wrapper_empty/tmp/merged_unpadded.lef
Warning: LEF master user_proj_example has no liberty cell.
Info: Added 1286 rows of 6323 sites.