{"id":419528,"date":"2025-02-13T04:30:38","date_gmt":"2025-02-13T04:30:38","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/lumerical-python-api-topology-optimization-error-2025-r1\/"},"modified":"2025-02-13T04:30:38","modified_gmt":"2025-02-13T04:30:38","slug":"lumerical-python-api-topology-optimization-error-2025-r1","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/lumerical-python-api-topology-optimization-error-2025-r1\/","title":{"rendered":"Lumerical Python API Topology Optimization Error 2025 R1"},"content":{"rendered":"

<p>I have python code that does topology optimization inverse design and it works for an older version of lumerical (2023 R2.3) on our computer, but it fails when I use it for the latest version, 2025 R1.  The error is below:<\/p><p>CONFIGURATION FILE {‘root’: ‘C:\\\\Program Files\\\\ANSYS Inc\\\\v251\\\\Lumerical\\\\api\\\\python’, ‘lumapi’: ‘C:\\\\Program Files\\\\ANSYS Inc\\\\v251\\\\Lumerical\\\\api\\\\python’}<br>Initializing super optimization<br>Checking for one forward simulation :   One forward simulation is in progress<br>One forward simulation is in progress<br>One forward simulation is in progress<br>Wavelength range of source object will be superseded by the global settings.<br>Traceback (most recent call last):<br>  File “C:\\Users\\LAB1\\Documents\\Inverse Design\\cross_split\\cross_split_opt.py”, line 93, in <module><br>    runSim(initial_cond, eps_min, eps_max, x_pos, y_pos, filter_R*1e-9, working_dir)<br>  File “C:\\Users\\LAB1\\Documents\\Nick\\Inverse Design\\cross_split\\cross_split_opt.py”, line 64, in runSim<br>    opt.run(working_dir = working_dir)<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimization.py”, line 471, in run<br>    self.initialize(working_dir=working_dir)<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimization.py”, line 361, in initialize<br>    self.optimizer.initialize(start_params=start_params,<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimizers\\optimizer.py”, line 100, in initialize<br>    self.reset_start_params(start_params, self.scale_initial_gradient_to)<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimizers\\optimizer.py”, line 108, in reset_start_params<br>    self.auto_detect_scaling(scale_initial_gradient_to)<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimizers\\optimizer.py”, line 115, in auto_detect_scaling<br>    gradients = self.callable_jac(params)<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimizers\\minimizer.py”, line 34, in callable_jac_local<br>    fom_gradients = callable_jac(params_over_scaling_factor) \/ self.scaling_factor<br>  File “C:\\Program Files\\ANSYS Inc\\v251\\Lumerical\\api\\python\\lumopt\\optimization.py”, line 223, in callable_jac<br>    canMakeAdjointSim = canMakeAdjointSim & opt.fom.can_make_adjoint_sim(opt.sim)<br>AttributeError: ‘Optimization’ object has no attribute ‘sim'<br>>>><\/p><p> <\/p><p>Any guidance on what changes are necessary to get it to run on the latest version would be appreciated.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-419528","topic","type-topic","status-publish","hentry","topic-tag-3DFDTD-1","topic-tag-lumerical","topic-tag-topology-optimization"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t