===Transition from versions 2.0.х to version 2.1 and higher===

From September, 10, 2013, upgraded version of the engine (2.1.6) for Ubuntu, Debian and CentOS is available.

Before using a new version for production, we recommend to test it on one or several broadcasts, if possible.

If you face any problems, please, write to the forum (http://forum.torrentstream.org) or email support@acestream.net.

<span style="color: #900;">ATTENTION!</span> In the nearest future support for older versions will be stopped.

<span style="color: #009;">IMPORTANT!</span> All broadcasts created via new version of Ace Stream (2.1 and higher) are not suppported by client software of old versions (2.0.х and lower). If you attempt to watch a new broadcast using the old engine, an error "Cannot load transport file" will appear.

** instead of <tt>acestreamengine-client-gtk</tt> you should launch <tt>acestreamengine --client-gtk</tt>

* log system is changed. In old versions the engine output all debug information into STDERR and redirecting the output was required to write logs into a file. In a new version it is possible to define in options, where to write logs - into STDOUT, into STDERR, into a file or syslog. Rotation of logs by their size is supported for files. You can read description of all options in [[#acestreamengine command|acestreamengine command]]

===acestreamengine command===