Antivirus software may have quarantined the file, or a bad mod manager operation deleted it. Fix:
Some older precombine fixing utilities (like the defunct xEdit Previs Scripts ) auto-named their output Ppf.esm as a default. restore precombined geometry. However, an .esm loads much higher than an .esp , which can cause conflicts if not placed correctly. Fallout 4 Ppf.esm
(Should be placed at the very bottom of the load order) PRP-specific Patches (Should load after PRP.esp) Technical Significance Antivirus software may have quarantined the file, or
Most mods that require Ppf.esm will also require the latest version of the game and all DLCs. Fallout 4 Ppf.esm