If you've just installed EZdrummer 3 and are seeing a "No MIDI library found" error, it's usually because the software hasn't been pointed to the correct folder or a registry entry from a previous version is blocking the path .
If you see a yellow triangle icon next to a path, it means the folder is missing or disconnected. 3. Check for Missing Core Content
regedit, press Enter.HKEY_CURRENT_USER\Software\Toontrack\EZdrummer3
MidiLibPath.Step 2: Delete the database.