Hi: I am using the following code with boost.filesystem: size_t origsize = strlen(argv[0]) + 1; size_t convertedChars = 0; wchar_t wcstring[1024]; mbstowcs_s(&convertedChars, wcstring, origsize, argv[0], strlen(argv[0])); boost::filesystem::wpath path(wcstring); path.filename() =L"compilation date.txt"; if (boost::filesystem::exists(path)) // boost::filesystem::remove(path); I have defined: #define BOOST_FILESYSTEM_NO_DEPRECATED The line that causes probles is: // boost::filesystem::remove(path); Anyone got any ideas why this line causes a window error report to be generated. For reference I'm including: #include <stdlib.h> #include <fstream> #include <boost/date_time/gregorian/gregorian.hpp> #include <boost/filesystem/path.hpp> #include <boost/filesystem/operations.hpp> #include <string> Cheers Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 4081 (20090517) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com