ID: 12785 Title: Fix "A negative value is not valid." in "Problem notification" Main Dashboard Component: Setup Level: 1 Class: Bug fix Version: 2.1.0i1 Chromium based browsers showed an error message in the developer tools: <tt>Error: &lt;rect&gt; attribute width: A negative value is not valid.</tt> This error was provoked by a broken windowing function in the python implementation and is now fixed. Furthermore the calculation of the windowing function was adapted: Before the first and last Bar was not a full sized window based on the current time. Now all time windows have the same duration.