material content section
December 22, 2012 9:22am UTC in response to Naser Yousefzadeh
Re: material content section
then green marks are the link between all the possble material properties, and thus identified by COMSOL based on the physics applicable to the domains where you attribute the material. So for some reason you have not (yet) linked the material to a domain (or if applicable to a Boundary for thin layer BC physics) such that COMSOL has not identified "n" as a required variable.
In RF optics there is a second possiblity: if your "physics" is defined using the epsilon_r material property, instead of the optical n,k properties, this might happen, but then there is a green mark for epsilon_r, if so, go to the physics node for the relevant domain/material and change the physics from epsilon_r driven to n,k driven, and that should do the job
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