RFCS.OBJ is refrencing the function 'GetRLSimuValue'. However the linker cannot find the symbol--which is what the error is saying.
It is not referring to RFCS.cpp, it is referring to the compilied object file.
One of the source files that are used to build RFCS.OBJ are refrencing 'GetRLSimuValue', but the linker cant find it to link and resolve the final symbols (to build the final *.exe)
This can also be any externel libraries that your code is using. i.e., if you are using Win32 API, or another API library that calls that routine.
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