Learning Forum

[rjz23]

I learned Lumerical FDTD over the last week, and the parameter sweeps and S-parameter sweeps used in it (as configured by the provided scripts) do not work. They keep giving the "Error: prompt line 1: syntax error" error message. I then tried to set up a simple simulation with only a source and a monitor (and a solver region), and swept the z position of the source (using the GUI to configure the sweep). This still didn't work. Is this a problem in the newest version?

[Guilin Sun]

"syntax error" error message mostly appears in script. Do you have any groups, or check the "model" and see if there is any script.

Please check this example https://optics.ansys.com/hc/en-us/articles/360034922873-Parameter-sweep-utility

I did a quick test with a new project file and new sweep object and it works fine:

[rjz23]

I don't have any groups, and my "model" object doesn't contain any scripts. My setup should be almost identical to yours, but it's still saying syntax error.

[Guilin Sun]

I would suggest you to have clean installation: https://optics.ansys.com/hc/en-us/articles/5613618572947-Fixing-installation-or-licensing-issues uninstall the current one first, clean all related files, reinstall it. You may also redo a new project file, or test this one: taper https://optics.ansys.com/hc/en-us/articles/360042800413-Linear-waveguide-taper

[rjz23]

Ok, but my installation is based on using the MS-MPI because I have VS Code also installed on my computer. Is there anything I should do differently to what the page says?

[Lito]

@rjz23, 

To debug the issue, please assist us with the following: 

1. Run a simulation example from our website, >>Parameter sweep utility – Ansys Optics ? Run this directly and also run the the sweep as shown in the image below. 
2. Download a simulation and script (.lsf) from our website, e.g. >>Photonic Crystal Slab (RCWA) – Ansys Optics. 
3. Run the script from the example above #2 and send a screenshot of the error message (if any).  

 

Run simulation and sweep: 

Run part/selection of script: