The "blabla" in title is the path where I ran the application

I got this exception when trying to logging first record. The console log shows up then the exception thrown.

In initializing code, I create an boost::log::sinks::text_file_backend with a parameter "boost::log::keywords::file_name = logs/%Y-%m-%d_%H-%M-%S-%N.log"

I tested the same code on Windows XP and Linux(Debian), it works.

help please.

Jinqiang ZHANG