6.20 Missing Items
If since saving a project file you have deleted from your hard drive, or moved, any VST or other FX used in that project, then when you next open that project REAPER will give you a message about missing items.
Kind: concept (user-guide-section) Chapter: 6 Managing Track and Item FX Source: REAPER User Guide v7.70
If since saving a project file you have deleted from your hard drive, or moved, any VST or other FX used in that project, then when you next open that project REAPER will give you a message about missing items. You can still load the project file, the FX will still be listed in the track FX chain but it will not be available. You can remove the FX from the chain and replace it with another, or reinstall the missing FX on your computer and then insert it.