Hello, I must be missing something basic, but I cannot find that in Boost.Iostream documentation. Suppose I am writing into filtering_ostream, and I'm done. I wish to close the ostream, flushing whatever remaining data and reporting whatever I/O errors arise to user. However: base64.cpp:17: error: ‘class boost::iostreams::filtering_ostream’ has no member named ‘close’ The documentation say: By default, if the Device at the end of the chain is popped or if the filtering_stream is complete when it is destroyed, all the filters and devices in the chain are closed using the function close. So I assume something is closed in destructor, but what if I don't want the destructor to potentially throw, and instead what to close the stream explicitly? - Volodya P.S. Actually, I'm sure there's a Trac issue saying that potentially throwing destructor is not good.