Add Internal Mass to Zone component error

[sepideh7]

In the past days, I had a problem with this file and uploaded Error in the forum. but I could not solve the problem.

@sepideh7

I wanna define the material of the pcm for the blinds between the two shells. The first problem is the definition of the blinds between the two shells in the cavity zone. And the second problem is the material definition for the blinds.I want to get the impact of PCM material on energy consumption in the adjacent cavity zone!