%Warning-PINNOCONNECT: t/t_inst_missing_bad.v:9:22: Cell pin is not connected: '__pinNumber2' 9 | sub sub (.ok(ok), , .nc()); | ^ ... Use "/* verilator lint_off PINNOCONNECT */" and lint_on around source to disable this message. %Warning-PINCONNECTEMPTY: t/t_inst_missing_bad.v:9:25: Cell pin connected by name with empty reference: 'nc' 9 | sub sub (.ok(ok), , .nc()); | ^~ %Warning-PINMISSING: t/t_inst_missing_bad.v:9:8: Cell has missing pin: 'missing' 9 | sub sub (.ok(ok), , .nc()); | ^~~ %Error: Exiting due to