[boost] [log] logfile not created where expected

hi, I encountered a bug, most probably, in Boost.Log It is reproduceable in the tutorial_logging.cpp : https://www.boost.org/doc/libs/1_74_0/libs/log/example/doc/tutorial_logging.... The short code should create a file named "sample.log". But it does not, instead it creates a file called "00000.log", with the expected lines logged in that file. If I compile and run exactly the same tutorial in Boost 1.70, the file sample.log is indeed created with the same content. The problem is already there in Boost 1.73 What is the problem? Is there a workaround for it? Thanks, regards, Barend