Could anyone please point to a mistake in the code?

Ask yourself these questions (and answer them)
is the problem what tableextract gives you ($row)? What is $row?
Or is the problem what you give to load ($row)? What does load do?

If you divorce the two (tableextract and text::table), and you employ ddumper^{Basic debugging checklist}, you can figure out the problem

As I see it, either tableextract doesn't give you everything, or load() isn't the same as add()

I suspect load() isn't the same as add() , because load means replace, and add means extend :)