Hi @abit, Since you are reviewing codes. Can you look at these errors? When I am Compiling v0.14.3rc1 with VS2013. I encounter two ambiguous call to overload function errors: http://dirtyimg.com/image/8error.PNG I believe the errors were introduced on issue [#476](https://github.com/steemit/steem/commit/3920af70cabb9f05b460b25a12a4191d35daddbc). https://github.com/steemit/steem/commit/3920af70cabb9f05b460b25a12a4191d35daddbc The compiling log is long, this is partial log. Thank You. 1). error C2668: 'fc::from_variant' : ambiguous call to overloaded function ~~~~ F:\Git_GUI\steem\libraries\fc\include\fc/reflect/variant.hpp(53): error C2668: 'fc::from_variant' : ambiguous call to overloaded function F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/operations.hpp(95): could be 'void fc::from_variant(const fc::variant &,steemit::chain::operation &)' F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/asset.hpp(123): or 'void fc::from_variant(const fc::variant &,steemit::chain::asset &)' F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/version.hpp(74): or 'void fc::from_variant(const fc::variant &,steemit::chain::hardfork_version &)' F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/version.hpp(71): or 'void fc::from_variant(const fc::variant &,steemit::chain::version &)' F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/types.hpp(269): or 'void fc::from_variant(const fc::variant &,steemit::chain::extended_private_key_type &)' F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/types.hpp(267): or 'void fc::from_variant(const fc::variant &,steemit::chain::extended_public_key_type &)' F:\Git_GUI\steem\libraries\chain\include\steemit/chain/protocol/types.hpp(265): or 'void fc::from_variant(const fc::variant &,steemit::chain::public_key_type &)' ~~~~ 2). error C2668: 'fc::raw::unpack' : ambiguous call to overloaded function ~~~~ F:\Git_GUI\steem\libraries\fc\include\fc/io/raw.hpp(292): error C2668: 'fc::raw::unpack' : ambiguous call to overloaded function F:\Git_GUI\steem\libraries\fc\include\fc/uint128.hpp(131): could be 'void fc::raw::unpack>(Stream &,fc::uint128 &)' with [ Stream=fc::datastream ] F:\Git_GUI\steem\libraries\fc\include\fc/io/raw.hpp(583): or 'void fc::raw::unpack,boost::container::new_allocator>>>(const std::vector> &,boost::container::flat_map,boost::container::new_allocator>> &)' with [ _Kty=fc::string , Key=std::string , T=steemit::chain::weight_type ] ~~~~