Operating on strings created from binary files loaded with LOAD FILE hangs execution

[Lartu]

Execution of the compiled program hangs when trying to GET LENGTH OF binary files, such as the attached picture, loaded into a string using LOAD FILE - IN.

Example code:

(...)
LOAD FILE argv:0 IN string_in
DISPLAY "Getting length..." crlf
GET LENGTH OF string_in IN length
DISPLAY "The length of the string is: " length CRLF  # <- This line is never reached.
(...)

This is the file I used as input.