fatal error LNK1113: invalid machine type

I'm doing an interfase for a card reader with a SDK, I have set the path to where the *.h are, when I compile the proyect doesn't reports any problem, but when I try to run the project display this error.

--------------------Configuration: UART - Win32 Debug--------------------
Linking...
C:\_HOME\ARCHIVOS RECIBIDOS\PP795\PP795 SDK\795PI411\LIB\libapi.a : fatal error LNK1113: invalid machine type
Error executing link.exe.

UART.exe - 1 error(s), 0 warning(s)

What can be the reason for this error and how can it be solved.

THANKS.

LNK1113 You're not running the program, it must have failed to compile if Visual Studio is trying to link it.

Viggy

Is this SDK made for Windows? In my mind lib files with a as the extension are usually for linux or some other OS.