No problems compiling and running the tests...

CMakeLists.txt

@@ -70,8 +70,14 @@ option (COOLPROP_TESTING
 
 file(GLOB_RECURSE APP_SOURCES "src/*.cpp")
 file(GLOB_RECURSE APP_HEADERS "include/*.h" "src/*.h")
+
+## You can exclude this file, in case you want to run your own tests or use Catch
 list(REMOVE_ITEM  APP_SOURCES "${CMAKE_SOURCE_DIR}/src/Tests/Tests.cpp")
-## You can exclude this file as well, in case you want to run your own tests
+list(REMOVE_ITEM  APP_SOURCES "${CMAKE_SOURCE_DIR}/src/Tests/CoolProp-Tests.cpp")
+
+## This file is only needed for the library, normal builds do not need it.
+list(REMOVE_ITEM  APP_SOURCES "${CMAKE_SOURCE_DIR}/src/CoolPropLib.cpp")
+
 
 set (APP_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/externals/Eigen")
 foreach (_headerFile ${APP_HEADERS})
@@ -131,10 +137,14 @@ endif()
 ###     FLUIDS, MIXTURES JSON       ###
 add_custom_target(generate_headers
                   COMMAND ${PYTHON_EXECUTABLE} "${CMAKE_SOURCE_DIR}/dev/generate_headers.py")
-
                   
 ###      COOLPROP LIB or DLL        ###
+if (COOLPROP_SHARED_LIBRARY)
+    list(APPEND APP_SOURCES "${CMAKE_SOURCE_DIR}/src/CoolPropLib.cpp")
+endif()
+
 if (COOLPROP_STATIC_LIBRARY)
+    list(APPEND APP_SOURCES "${CMAKE_SOURCE_DIR}/src/CoolPropLib.cpp")
     add_library(${app_name} STATIC ${APP_SOURCES})
     add_dependencies (${app_name} generate_headers)
     set_target_properties (${app_name} PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -DCOOLPROP_LIB -DCONVENTION=__cdecl")

include/CoolProp.h

@@ -1,9 +1,9 @@
 /*
 This header file includes the high level API that is meant to be accessed via C++.  Functions may accept C++ types like std::vector
 
-For the C-style wrapper, refer to CoolPropLIB.h
+For the C-style wrapper, refer to CoolPropLib.h
 
-\sa CoolPropLIB.h
+\sa CoolPropLib.h
 */
 
 /*! \mainpage CoolProp Core Code Documentation

src/Tests/CoolProp-Tests.cpp

@@ -13,7 +13,7 @@
 #include "catch.hpp"
 #include "CoolPropTools.h"
 #include "CoolProp.h"
-#include "CoolPropLIB.h"
+#include "CoolPropLib.h"
 
 namespace TransportValidation{