[Boost-users] [interprocess] file_lock permission denied

Hi, I'm trying to use file_lock from interprocess but without success. Here is code I'm using: m_Stream.exceptions(std::ios::badbit); m_Stream.open(m_FileName.c_str()); boost::interprocess::file_lock lock(m_FileName.c_str()); ... { // Lock file boost::interprocess::scoped_lock<boost::interprocess::file_lock> scoped_file_lock(lock); // Write to stream m_Stream << "Some text"; m_Stream.flush(); } where m_Stream is std::ofstream. When "m_Stream.flush()" is executed, I've got a "badbit" exception with "errno" 0x001b0800 and message (with strerror()) "Permission denied". I've tried also with win32 CreateFile()/WriteFile() but without success. I'm using boost 1.40, Visual Studio 2005 SP1, Vista 32 bit SP2 Thanks Trigve