CUSP is not defined #7
Description
Running through the terminal I get the following error. Without using gpu acceleration.
C:\Users\stefa\Downloads\PyTopo3D-main>python main.py --nelx 32 --nely 16 --nelz 16 --volfrac 0.3 --penal 3.0 --rmin 3.0
[2025-09-19 10:11:25,680] INFO - Experiment name: topo3d_20250919_101125_d1640b
[2025-09-19 10:11:25,680] INFO - No obstacle configuration provided, creating a default empty obstacle mask
[2025-09-19 10:11:25,681] INFO - Combined obstacle and design space masks, 0 elements restricted
[2025-09-19 10:11:25,681] INFO - Building force vector (using default settings)
[2025-09-19 10:11:25,681] INFO - Building support constraints (using default settings)
[2025-09-19 10:11:25,683] INFO - Generated boundary condition visualization arrays
C:\Users\stefa\Downloads\PyTopo3D-main\pytopo3d\utils\results_manager.py:154: UserWarning: This figure includes Axes that are not compatible with tight_layout, so results might be incorrect.
fig_copy.tight_layout()
[2025-09-19 10:11:26,355] INFO - Boundary conditions visualization saved to results\topo3d_20250919_101125_d1640b\visualizations\boundary_conditions_and_obstacles.png
[2025-09-19 10:11:26,355] INFO - Starting optimization with 32x16x16 elements...
[2025-09-19 10:11:26,387] INFO - Linear solver: PyPardiso (multi-core)
[2025-09-19 10:11:27,592] ERROR - Error in main function: name 'cusp' is not defined
C:\Users\stefa\Downloads\PyTopo3D-main>
Running the same thing through VSC for example I get the following
$ python run.py
[2025-09-19 10:14:36,007] INFO - Linear solver: PyPardiso (multi-core)
Traceback (most recent call last):
File "C:\Users\stefa\Downloads\PyTopo3D-main\run.py", line 12, in
result = top3d(nelx, nely, nelz, volfrac, penal, rmin, disp_thres)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\stefa\Downloads\PyTopo3D-main\pytopo3d\core\optimizer.py", line 234, in top3d
xnew, change = optimality_criteria_update(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\stefa\Downloads\PyTopo3D-main\pytopo3d\utils\oc_update.py", line 74, in optimality_criteria_update
) or isinstance(H, cusp.csr_matrix)
^^^^
NameError: name 'cusp' is not defined