The game installer or an automatic mod updater attempts to replace VintagestoryLib.dll while a previous instance of the game or server is still running in the background.
Modding:Decompiler - Vintage Story Wiki
On some systems, Windows may block DLL files downloaded from the internet. You can right-click the file, go to Properties , and check the "Unblock" box if it appears at the bottom of the General tab.
An "exclusive access" error generally occurs when the operating system prevents a program from opening or modifying a file because another process has already "locked" it for its own use. For Vintage Story players, this usually manifests in three scenarios:
For developers, this DLL is a primary target for decompilation when trying to understand how the internal engine works. Tools like ILSpy or dnSpy are commonly used to peak into VintagestoryLib.dll to find hooks for complex code mods. However, most modders should stick to referencing VintageStoryApi.dll to ensure their mods remain compatible across different versions of the game engine.
Ensure your game is looking in the correct directory. The default path for game files is typically %APPDATA%\Vintagestory . Modding and VintagestoryLib.dll
Because this file is the "brain" of the application, it must be loaded and accessible at all times while the game is running. The "Exclusive Access" Conflict
Before troubleshooting, it is essential to understand the role of this file. According to the Vintage Story Wiki , is the heart of the game's engine. While VintageStoryApi.dll provides the tools for mods to communicate with the game, VintagestoryLib.dll contains the actual code necessary to run both the game client and the game server.
Understanding the VintagestoryLib.dll "Exclusive" Error and Game Architecture
