COMSOL Error for Initial Values(RF Module)

I am defining a model with different concentrations of oil and water and trying to measure the heat distribution by using the microwaves. But I obtained the error mentioning Initial values:

THE FOLLOWING FEATURE HAS ENCOUNTERED A PROBLEM
-FEATURE:TIME DEPENDENT SOLVER
-ERROR:FAILED TO FIND CONSISTENT INITIAL VALUES

Failed to find consistent initial values.
Undefined value found.
NaN or Inf found when solving linear system using SOR.

Although the initial values defined are by default and I did not change any thing.Please see the attached file.

Can anybody suggest me some solution of these problems?

Thanks in advance.