OpenLane Notebooks: "::env(FP_PDN_LOWER_LAYER)": no such variable

[ThomasPluck]

Hello,

I've been trying to use the notebooks, and I came across this strange error at Step 6 of the OpenLane flow:

[INFO]: Reading ODB at '/content/runs/RUN_2023.06.17_19.13.55/tmp/floorplan/5-tapcell.odb'...
define_corners Typical
read_liberty -corner Typical /content/conda-env/share/pdk/sky130A/libs.ref/sky130_fd_sc_hd/lib/sky130_fd_sc_hd__tt_025C_1v80.lib
Error: pdn_cfg.tcl, 92 can't read "::env(FP_PDN_LOWER_LAYER)": no such variable
child process exited abnormally

[ERROR]: Creating issue reproducible...

I'm not sure if this belongs on OpenLane instead, but I've seen this error on both the XLS Adder and Digital Inverter.

Thanks,

Thomas Pluck

[proppy]

related The-OpenROAD-Project/OpenLane#1877

[proppy]

This seems to be fixed with:

openlane            2023.06.26_0_g3bc9d02d  20230606_125334       litex-hub      12MB

[proppy]

Related hdl/conda-eda#343