extract the eigenvalue from Mode analysis via Matlab code

Hi,
I know in version 3.5, use "fem.sol.lambda" to extract the eigenvalues. But I suffered a problem in version 5.0. How to extract the effective mode index or eigenvalues in version 5.0 with Matlab code?
I tried with the following "model.sol.eigsol", but an error comes "??? No appropriate method, property, or field eigsol for class com.comsol.clientapi.impl.SolverSequenceListClient.". I search around COMSOL Programming Reference, but still no clear idea.

I think it is a common problem, can anyone give a hint?

Br,
Lisa