Notice 0: Finished DEF file: /project/openlane/user_proj_example/runs/user_proj_example/results/floorplan/user_proj_example.floorplan.def

[INFO] DBU = 1000

[INFO] SiteSize = (460, 2720)

[INFO] CoreAreaLxLy = (5520, 10880)

[INFO] CoreAreaUxUy = (2914100, 3508800)

[INFO] NumInstances = 398959

[INFO] NumPlaceInstances = 263087

[INFO] NumFixedInstances = 135872

[INFO] NumDummyInstances = 0

[INFO] NumNets = 263165

[INFO] NumPins = 745996

[INFO] DieAreaLxLy = (0, 0)

[INFO] DieAreaUxUy = (2920000, 3520000)

[INFO] CoreAreaLxLy = (5520, 10880)

[INFO] CoreAreaUxUy = (2914100, 3508800)

[INFO] CoreArea = 10173980153600

[INFO] NonPlaceInstsArea = 176439219200

[INFO] PlaceInstsArea = 3873665152000

[INFO] Util(%) = 38.746181

[INFO] StdInstsArea = 3873665152000

[INFO] MacroInstsArea = 0

[InitialPlace]  Iter: 1 CG Error: 0.00450895 HPWL: 3010546830

[InitialPlace]  Iter: 2 CG Error: 0.000423626 HPWL: 2870185581

[InitialPlace]  Iter: 3 CG Error: 9.81709e-05 HPWL: 3027963641

[InitialPlace]  Iter: 4 CG Error: 0.00010681 HPWL: 3144287874

[InitialPlace]  Iter: 5 CG Error: 2.9495e-05 HPWL: 3159554641

[InitialPlace]  Iter: 6 CG Error: 1.50974e-05 HPWL: 3171288273

[InitialPlace]  Iter: 7 CG Error: 1.20963e-05 HPWL: 3176073045

[InitialPlace]  Iter: 8 CG Error: 1.05411e-05 HPWL: 3173130617

[InitialPlace]  Iter: 9 CG Error: 8.16756e-06 HPWL: 3176220599

[ERROR] Filler area is negative!!

Please put higher target density or

Re-floorplan to have enough coreArea

(REPL-1)

Error: RePlAce terminated with errors.

Only at 40% utilization. What is it complaining about?