This is a known issue. Your best bet is to leave the glisses out of your score when making a recording, and putting them back in for your printed parts. Using two files makes sense in this situation. It's not a perfect solution, but it's not a perfect world either.

JT

I'm having the same problem now - four years later? Finale? Can you do something about this?

Don't hold your breath.

But to be fair to MM, there's not much they can do. To get accurate playback of glisses, they would have to be sampled. That would mean sampling every starting and ending pitch at different speeds. That's not going to happen.

Glisses by an actual instrument are created differently by each player. I play trumpet and when I gliss I move the valves fast, sometimes using only a half valve and change my embouchure to reduce the tension of the lips. There's no midi command that can do that to a pitch. So I refer back to my initial post and suggest that you leave the glisses out and accept the fact that Finale's playback is just an imperfect  computer interpretation of the score. Then print your chart out and find a live band to play it.

The add-on Garritan Harps package (which is not the Harp that comes with Finale) allows one to set the pitch pedals with controller codes to achieve a truly pitched glissando. I set up a series of Expressions that allow me to set the pedals in advance of a gliss, but nothing in Finale itself allows one to set up harp pedaling in Finale itself as some other programs do.

Yes on Garritan Harps!