Without OpenIV’s Update.rpf plugin, the game will ignore your added DLC packs. Always reinstall the plugin after a major game update.
You’ll rarely see mpsum alone—it usually appears as mpsum/dlcrpf in error logs or file paths. This typically relates to multiplayer content or patch-summary files used by the game to verify DLC integrity. update x64 dlcpacks mpsum dlcrpf download top
When you need to update mpsum related files: Without OpenIV’s Update
The fix:
Never manually edit mpsum files. Instead, let the Rockstar Launcher verify your game files. Then, re-enable your mods one by one using OpenIV’s "ASI Manager" to restore modded dlcrpf files. The fix:
Never manually edit mpsum files
A DLC pack made for GTA V version 1.0.1868 may not work on version 1.0.3258. Check the mod description for compatibility before you download dlcrpf files.