The easy answer is there is a conflict with something. But finding it is the hard part. It is way more difficult for us since we don't know what Finale you have or what computer and OS you have. Or, if it is even a Finale problem.

As Ernest indicated, we can’t read minds. These suggestions should help us know more

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

Finale PrintMusic 8

PC  Windows 10

No such thing as PrintMusic 8.

Assuming the latest version of Print Music available.

Finale Error Initializing Pitch Recognition Error Codes are caused in one way or another by misconfigured system files in your windows operating system.

If you have Finale Error Initializing Pitch Recognition errors then we strongly recommend that you Download (Finale Error Initializing Pitch Recognition) Repair Tool.