First thing to try: restart the computer.

If that doesn't help, export the piece as XML, and re-import it.

Beyond that, rebuild the preferences.

If that doesn't work, we need more info:

https://makemusic.zendesk.com/hc/en-us/community/posts/215729367-General-Discussion-House-Rules

i’ve actually made a keyboard shortcut for:

Please add the program and version you are using, to your signature in the control panel.

I will be using it a lot, I think...

Hi Everyone and thanks for the replies. Sorry for the minimal details, so firstly it's windows 10, Finale 26, with Noteperformer. 

This is actually proving to be even stranger than I thought...
Take a look at the attached figure for violin. Right now the first slur will play but no subsequent slurs.  If I delete the first 5-let figure than the next figure plays slurred but none after that etc.  It always plays only the first slur.  I don't see any hidden expressions or articulations or anything.  I deleted and readded the slurs to no avail.

I restarted my computer and it didn't have an effect, and exporting/importing the XML requires a lot of edits afterwards to get certain things back to where they are so I'd like to avoid it if possible.  Sorry for my ignorance but does rebuilding preferences only affect this one file? Finale gives a somewhat frightening warning message which seems to suggest it's global, and I don't want to affect other files which work well of course.

Thanks

Rebuilding the references won’t change any existing work. What it does, is resets Finale to its factory setup. If you have made any changes to your global (program) options, you will need to reset them.

Before resetting the preferences, you can drag the current file out of its folder, to the desktop. When you restart Finale, the program looks for the prefs file. When it doesn’t find it where it,belongs, it will create a new one. If resetting the prefs doesn’t solve the problem, you can replace the new file with the old one.