bootchart 'No path given' error

I already installed pybootchartgui and boot chart in Ubuntu 16.04. After running

sudo pybootchartgui

or

sudo bootchart

this is the result:

No path given, trying /var/log/bootchart.tgz  
warning: path '/var/log/bootchart.tgz' does not exist, ignoring.
Parse error: empty state: '/var/log/bootchart.tgz' does not contain a valid bootchar

There is a duplicate question here. It is is very old and the answers provided doesn't work.

Since systemd came in, many old tools are now deprecated. bootchart is one of those. To have a graphic representation of your boot you can use the internal tools without needing to install anything else.

Use

systemd-analyze plot > ~/plot.svg

and you will have the file plot.svg ready in your home.

Please be sure to always follow guides and instructions for the correct version of Ubuntu that you have!