Error entitled "the DAE is structurally inconsistent"

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Hello everyone,

I have a problem in my model, which is simulated in the RF time-dependent module. The error is "Errors when compiling equations. The DAE is structurally inconsistent." I think it is because of the boundary condition. I defined a uniform lumped port and connected it to the electrical circuit module. I would appreciate it if anyone took a look at my simulation file and helped me.


1 Reply Last Post Jul 3, 2024, 12:59 p.m. EDT
Robert Koslover Certified Consultant

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Posted: 4 months ago Jul 3, 2024, 12:59 p.m. EDT

Hmm. There's a lot of complexity in that model. I tried running it and get a different error message than you. The error I saw was:

"Undefined variable. - Variable: comp1.temw.normJs - Geometry: geom1 - Boundary: 105 Failed to evaluate expression. - Expression: comp1.temw.normJs Failed to evaluate expression. - Expression: comp1.bnd1"

Anyway, did you happen to prepare a simpler model first, and if so, did you succeed in executing it? If not, then I suggest you try that. It is often fairly quick and easy to diagnose issues in simple models, while it is often difficult and time-consuming to diagnose issues in complicated models.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Hmm. There's a lot of complexity in that model. I tried running it and get a *different* error message than you. The error I saw was: "Undefined variable. - Variable: comp1.temw.normJs - Geometry: geom1 - Boundary: 105 Failed to evaluate expression. - Expression: comp1.temw.normJs Failed to evaluate expression. - Expression: comp1.bnd1" Anyway, did you happen to prepare a *simpler* model first, and if so, did you succeed in executing it? If not, then I suggest you try that. It is often fairly quick and easy to diagnose issues in simple models, while it is often difficult and time-consuming to diagnose issues in complicated models.

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