Wall by profile with inside loops

Is there a way to create a wall by profile with curve loops inside the main profile?

I tried the Wall.ByProfile node from the Wombat package, but it just creates a separate wall for each profile (and places them on the same bottom position as well).

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You need to feed a flattened list of curves to the input “profile.”

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You’re right, I tested it on a simple case in a new file and it worked.
In my script however, it would give an error if I tried to feed it a list of flattened curves.

I was able to trace the problem to where I had grouped the curves and joined them into polycurves before joining with another list and exploding them again. For some reason that was causing a problem even though I ended up with seemingly the same curves in the end.
Anyway, I removed that part of the script and it worked perfectly.

Thanks for the pointer!