Thermal losses from RF Electromagnetic Waves

Dear all,
my problem is the coupling between an RF probelm and a thermal problem, do to the test I made 2 "attached" Blocks
and I solve before an RF problem on block1 with the calculation of the Eigenfrequency modes as "study1" and after I solve as "study2" in the near Block 2 the problem of Heat Transfer in Solid, what I get is 2 independ solutions without
any connections. If I try to include the Heat Flux from the study1 to the study2 I get the following error:
Failed to evaluate variable.
- Variable: freq
- Geometry: 1
- Boundary: 6
Failed to evaluate variable.
- Variable: mod1.emw.freq
- Defined as: freq
Failed to evaluate variable.
- Variable: mod1.emw.omega
- Defined as: (mod1.emw.freq*(pi*2))
Failed to evaluate variable.
- Variable: mod1.emw.iomega
- Defined as: (mod1.emw.omega*i)
Failed to evaluate variable.
- Variable: mod1.emw.Jsz
- Defined as: ((sqrt((epsilon0_const/mu0_const))*mod1.tEz)*sqrt((((mod1.emw.sigmabnd/(epsilon0_const*mod1.emw.iomega))+mod1.emw.epsilonrbnd)/mod1.emw.murbnd)))
Failed to evaluate expression.
- Expression: realdot(mod1.emw.Jsz,mod1.tEz)
Failed to evaluate expression.
- Expression: realdot(mod1.emw.Jsz,mod1.tEz)
Failed to evaluate variable.
- Variable: mod1.emw.Qsrh
- Defined as: (0.5*(realdot(mod1.emw.Jsz,mod1.tEz)+(realdot(mod1.emw.Jsy,mod1.tEy)+realdot(mod1.emw.Jsx,mod1.tEx))))
Failed to evaluate variable.
- Variable: mod1.ht.q0_hf1
- Defined as: mod1.emw.Qsrh
Failed to evaluate expression.
- Expression: d((mod1.ht.q0_hf1*test(mod1.T))*(dvol),{test@4})

What can be the way to connect the two problems?
Thank you very much,
Michele Comunian