undefined first referenced
symbol in file
--------- ----------------
_write_ram F:\CCStudio_v3.3\MyProjects\sercon_test\sercon0\Debug\main.obj
_write_reg F:\CCStudio_v3.3\MyProjects\sercon_test\sercon0\Debug\main.obj
_read_ram F:\CCStudio_v3.3\MyProjects\sercon_test\sercon0\Debug\main.obj
_read_reg F:\CCStudio_v3.3\MyProjects\sercon_test\sercon0\Debug\main.obj
>> error: symbol referencing errors - './Debug/sercon0.out' not built