Um, so... which line is line #34 in your code?
(Since the <code> tag does not, by itself, number the
lines, it will be helpful in your posting if you add a comment
line that is referred to in a quoted error trace, to make
Let me guess that it might be this line:
my $e1 = $p->add( 'Entry',
I'm guessing it's this one, because the error says you're
trying to call an "add" method on a "Frame" widget, which
has no such method; and while I have never used a NoteBook
widget before, I wouldn't be surprised to look in its docs
and discover that the widget you get back when you call
the "add" method on a NoteBook is ... a Frame, which would
make your "$p" a frame widget and raise the error.
You should look that up.
As for buckaduck's reply, it is of course
fine (and frequent practice) to both invoke and pack a
widget at "the same time", as you do in your original code.
Don't worry about that.
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