Missing RADPOW Output in Submodel Acoustic Analysis of a Cube with Acoustic Cavity

Hello everyoneAbaqus 

I am working on an acoustic analysis in Abaqus involving a simple cube structure (global model) covered by an acoustic cavity mesh (submodel). After running the global model and using its output database for the submodel analysis, I am encountering an issue where only the pressure (POR) appears in the history output of the submodel, but not the radiated power (RADPOW), despite no errors or warnings being present in the logs.

Here is the relevant part of my submodel's input file:
*OUTPUT, HISTORY, frequency=1
*ENERGY OUTPUT, ELSET = outer_infinite
RADPOW
*NODE OUTPUT, NSET = por
POR

ELSET  outer_infinite includes the acoustic infinite elements. My objective is to observe the radiated power from the acoustic cavity mesh.

Could anyone suggest why RADPOW might not be appearing in the output and how I can resolve this issue?

Thank you for your assistance!

Edit: I found out that it is not possible to calculate RADPOW in sequentially coupled analysis because the submodel doesn't contain the structure. We can use ALLQB in the submodel to calculate the energy lost to infinite elements and compare it with RADEN in the fully coupled analysis