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The Snap7 library error LNK2001 in VS2022 is a linker error that occurs when Visual Studio is unable to find a symbol or function in the Snap7 library. It usually happens when there is a problem with the Snap7 library installation or configuration. The error message typically includes the name of the missing symbol, making it easier to identify and fix the issue. Some possible solutions to this error include checking the Snap7 library path, updating the library version, or reinstalling the library altogether. It may also be helpful to consult the Snap7 library documentation or community forums for further guidance.