We should replace the stack-seaking "include-if-exists" function with the TIB-reading "try-include" that I developed for our purposes. Copy of try-include is below:

: try-include ['] include catch if 0 parse 2drop then ; immediate

That will act like "include", read arguments from the TIB like "include", and silently fail if "include" fails. In other words... use it like "include" as a drop-in replacement that will silently ignore errors.