Hi, I have the following program and files .test.seg and test.seg. I try to run the main program. It seems that boost filesystem doesn't recognize file name starting with a dot. Is it a bug in boost filesystem. Or I didn't use it properly? Thanks, Peng $ ls -a . .dep main-g.exe main.o main-o.o .test.seg .. main.cc main-g.o main-o.exe Makefile test.seg $ cat main.cc #include <iostream> #include // includes boost/filesystem/path.hpp #include int main() { if(boost::filesystem::exists("test.seg")) std::cout << "good" << std::endl; if(boost::filesystem::exists(".test.seg")) std::cout << "good1" << std::endl; } $ ./main-g.exe good terminate called after throwing an instance of 'boost::filesystem::filesystem_error' what(): boost::filesystem::path: invalid name ".test.seg" in path: ".test.seg" Aborted