On 06/11/15 17:43, YongHao Hu wrote: > +@ cdecl -ret64 -arch=win32 ?_File_size at sys@tr2 at std@@YA_KPBD at Z(str) msvcp120.?tr2_sys__File_size > +@ cdecl -ret64 -arch=win64 ?_File_size at sys@tr2 at std@@YA_KPEBD at Z(str) msvcp120.?tr2_sys__File_size This is not going to work. Thanks, Piotr