Cron Dataflow "Import All Products"

Hi guys, I have a little problem.

I would like to setup a cron to call the dataflow "Import all products" because I would like to import the csv in the default folder (var/import),
I have read many guides, like this:

http://stackoverflow.com/questions/3...e-programmatic

but doesn't work :(

Can someone help me? I use Magento 1.9.2.4

this is log error:

Code:

---

========================== BEGIN IMPORT ==========================
2016-09-20T16:15:28+00:00 DEBUG (7): User 'myusername' logged in.
2016-09-20T16:15:28+00:00 DEBUG (7): 11,12 mb - ERROR: Can't getAdapter

---

Thank you so much