"complete" refers to to the fields that are showing. So if you
configure your interlinear to not show Word Glosses, then "complete"
will not take those into account. (There were previous versions of
FLEx where it did count those, even if they weren't showing, but the
last few versions had that fixed.)
However, Word Glosses are useful for things like the Discourse Chart
and the Assign Analysis command in the Words & Texts area. Many
people go along not entering Word Glosses, and then later wish that
they had, because they find these other two things hard to use
without them.
If you have the Word Gloss line showing as you are interlinearizing,
it should be relatively painless to get that populated--it just
guesses the same thing you have for the Lex Gloss. So I recommend
that people leave it showing, even if they don't have much use for it.
Alternatively, there is an SQL query that can be run (in a separate
utility) to populate Word Glosses if you didn't do it the first time
around. It's not perfect, but it can get a lot of them in.
Let us know if you have a current version of FLEx, and "jump to
incomplete" is paying attention to fields other than the ones showing.
-Beth