This error usually happens because the project is pointing to the wrong library folder or platform. Since you’re using a 64-bit system, the first thing you should do is switch your build configuration in Visual Studio from x86 to x64, because the SDK has separate libraries for each. Right now your project is trying to load the file from ....\lib\x86\Debug\ASICamera2.lib, which likely doesn’t exist. Go into your project properties, open Linker → General → Additional Library Directories, and change that path to the correct one, usually something like ....\lib\x64. Also make sure under Linker → Input that ASICamera2.lib is listed. After that, check that the DLL file (ASICamera2.dll) is copied into your output folder (like x64\Debug), otherwise the program won’t run even if it builds. Lastly, confirm your include directory is set to the SDK’s include folder so headers are found. In short, the fix is to match the platform (x64), correct the library path, and ensure the required .lib and .dll files are in the right places.