Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Undefined variable. - Variable: comp1.Ne

Please login with a confirmed email address before reporting spam

Dear Colleagues, I want to simulate a 3D MOSFET using semiconductor module. But, I am getting this error in the source domain:

Undefined variable.

  • Variable: comp1.Ne

  • Geometry: geom1

  • Boundaries: 23, 34

Failed to evaluate Jacobian of expression.

  • Expression: comp1.Ne

Failed to evaluate Jacobian of expression.

  • Expression: (-comp1.semi.nJntest(comp1.Ne))(dvol)

Please help.

Hirak


1 Reply Last Post 20 giu 2018, 08:42 GMT-4
Chien Liu COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 6 years ago 20 giu 2018, 08:42 GMT-4
Updated: 6 years ago 20 giu 2018, 10:42 GMT-4

Dear Hirak,

3D semiconductor models require swept mesh, as shown in this example:

https://www.comsol.com/model/3d-analysis-of-a-bipolar-transistor-19699

If your license is up to date you can send questions to support@comsol.com

Sincerely,

Chien

Dear Hirak, 3D semiconductor models require swept mesh, as shown in this example: If your license is up to date you can send questions to support@comsol.com Sincerely, Chien

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.