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Error 7111 Singular matrix

Posted 20.07.2010, 10:18 GMT-4 0 Replies

Tianyou YI
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I'm using the PDE modes in Comsol to solve a nonlinear problem in a rectangle domain which is divided into two small rectangles and the rest. When I click the solve button, the following error message appear “ Error 7111 Singular matrix”. Dose anyone know where is the problem?

I also find that some boundaries around the two small rectangles are inactive, which means I cannot modify their boundary conditions. And I need to fix their boundary conditions, can anyone give me some help?

I have attached my file

Thanks in advance

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0 Replies Last Post 20.07.2010, 10:18 GMT-4
COMSOL Moderator

Hello Tianyou YI

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