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Undefined variable for Heat Transfer in Solids error
Posted 2025/10/29 9:39 GMT-4 1 Reply
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Hello, I am getting this error even when all the variables are defined. COMSOL should automaticaly create qy and qx. This is the error:
Undefined variable. - Variable: ht.qy - Geometry: geom1 - Boundaries: 17, 24, 41, 60, 73, 91 Failed to evaluate expression. - Expression: ht.qy Failed to evaluate expression. - Expression: comp1.intopY(ht.qy) Failed to evaluate expression. - Expression: comp1.intopY(ht.qy) - Feature: Global Evaluation 1
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For some reason, that variable is not available on the specific boundaries which the error message identified and under the circumstances that you are endeavoring to access it. I can imagine a number of possible scenarios in which this might occur. I suggest you post your .mph file to the forum -- I suspect it will not be difficult for other users here to find what went wrong, once they can see what you did. It could even be as simple as a failure to set up the problem to actually compute these quantities.
-------------------Scientific Applications & Research Associates (SARA) Inc.
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