1. Quit Pro Tools.
2. In Finder, choose Go/Library/Preferences/Avid/Pro Tools.
3. Locate and delete: InstalledAAXPlugIns.
4. Additionally (for Pro Tools 2024+): Clear cache files under: /Users/Shared/Pro Tools/AAXPlugInCache.
5. Re-open Pro Tools, it will force a full rescan of all plug‑ins.
After performing the procedure above, and opening the old project that didn't play all tracks, they all played as expected and the issue is fixed.
Hope this info can be valuable to someone else as well. :)
Best,
John André
To view this discussion visit https://groups.google.com/d/msgid/ptaccess/A94FD675-6170-4C6E-93E3-E45A98246B5E%40gmail.com.