When I run the regression tests for Boost.Filesystem on Solaris with Sun C++ 5.9 I get this error: sun.compile.c++ ../../../bin.v2/libs/filesystem/build/sun/debug/link-static/operations.o "../../../libs/filesystem/src/operations.cpp", line 1060: Error: Cannot use std::pair<boost::system::error_code, int> to initialize std::pair<boost::system::error_code, unsigned long long>. "../../../libs/filesystem/src/operations.cpp", line 1062: Error: Cannot use std::pair<boost::system::error_code, int> to initialize std::pair<boost::system::error_code, unsigned long long>. "../../../libs/filesystem/src/operations.cpp", line 1096: Error: Cannot use std::pair<boost::system::error_code, int> to initialize std::pair<boost::system::error_code, long>. 3 Error(s) detected. "CC" +d -g -DBOOST_ALL_NO_LIB=1 -DBOOST_All_STATIC_LINK=1 -DBOOST_SYSTEM_STATIC_LINK=1 -I"../../.." -c -o "../../../bin.v2/libs/filesystem/build/sun/debug/link-static/operations.o" "../../../libs/filesystem/src/operations.cpp" Is this a known problem? Boris