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"Error: Cannot evaluate expression." in AC Capacitor introductory example
Posted Aug 15, 2019, 10:43 a.m. EDT Electromagnetics, Low-Frequency Electromagnetics, Results & Visualization 1 Reply
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Hello,
I am just starting out using COMSOL, so I am using this tutorial, and others, to help me get acquainted with the software. Everything goes OK until I get to the "Global Evaluation 1" and "Global Evaluation 2" on page 12. When I try to evaluate the stated expressions (i.e. "ec.Y11" and "imag(ec.Y11)/ec.omega"), I get an error dialoge box:
"Error Cannot evaluate expression. Undefined variable. - Variable: ec.Y11 - Global scope Failed to evaluate expression. - Expression: ec.Y11"
When clicking the "more information" link, nothing happens, but as I understand, the variable "ec.Y11" has not been created yet. However, I don't know how to create that variable. Has anyone run into this error before? Can someone help me fix this? I have very little experience with COMSOL so any information would be helpful!
I've uploaded the file I'm using for reference, but I had to use 7zip to make the file small enough to upload.
Thanks!!
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Take your original file, go to Study > Clear Solutions, save, and then post the mph file. You will likely get a response.
Personally I don't have a utility to decompress your file.