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Hi all,

I've been having a really frustrating problem with parameter sweep, and was wondering if anyone has any insight:

I am simulating the 2D cross-section of a co-planar waveguide, and am sweeping over a series of parameters that vary this cross-section. The parameter sweep worked perfectly fine initially, but after returning to the file after a few days, every subsequent computation of the same parameter sweep breaks the geometry. I can change the parameter manually, build the geometry, and everything works fine, but as soon as I try to sweep over multiple values at once in the study section, not only will the geometry be wrong in the final data, but it will also break the actual geometry in the component, and I will have to reconfigure a few features in the geometry. I have tried several different implementations of the geometry and the same issue persists. In the attached file, the specific problem is that the "delete" feature in the geometry gets broken, introducing a few extra domains. I have tried using boolean features (union, difference, etc), as well as virtual operations to remove these domains, but the issue is always the same. After the parameter sweep, these deleted regions will always be filled in again.

The fact that the parameter sweep worked before and doesn't now is particularly confusing to me, and I am at a complete loss. Any help would be greatly appreciated.

Thanks,