On Tue, Jan 28, 2020 at 5:41 PM Andrew McFarlane via Boost-users
<boost-users@lists.boost.org> wrote:
> I have copied the code from tutorial #1 into my IDE,
> Timer.1: Using a timer synchronously: > https://www.boost.org/doc/libs/1_72_0/doc/html/boost_asio/tutorial/tuttimer1.html

You're using the example code from Boost 1.72.0. Are you also using
the asio headers from Boost 1.72.0? Or do you have an older version of
Boost installed (say, the one that comes with your OS distribution)?

Thanks