Smart block track length criteria

Good evening

How should the track length criteria work for smart blocks?

Even when entering length > 0 and pressing preview I don’t see any results…

So what is the exact format for the track length specifier?

thanks in advance

Ah got it…must be in the hh:mm:ss firmat,

But what still puzzles me:

When I set the Limit to 24 hours and press the preview button, the duration is always shown as ~24:00:00.0, even when there are only a few tracks…

So how can I see the total length it uses?