Hello, when I export it only export 16 secs of audio, this is the trial version.
Hi and welcome to the forum,
By default Cubase exports the locators range. How are the locators set up in your project, please?
Highlight the whole session you want to export and press P on your keyboard.
That will set tee locators at the beginning and the end of your song. Then Export the mix down.
See if that works.