program works with maxima 5.29.1 but freezes with maxima 5.30.0



Hello, list. I have wxmaxima program that takes a few seconds to run 
with maxima 5.29.1. But  in maxima 5.30.0 it freezes.  Is there any way 
to make it work with maxima 5.30?

The program is attached. Sorry, i cannot provide more simple example as 
i have no idea what is going on.
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