Fatal error on upgrade to eZ Publish 4.0

Friday 20 June 2008 10:14:26 am

I follow upgrade instrunction 3.10 -> 4.0.
Running bin/php/updateniceurls.php --import -s corporate_site_admin
I get folllowing error mesage:

PHP Fatal error:  Call to a member function attribute() on a non-object in /home/prostobank.info/public_html/kernel/classes/ezcontentobjecttreenode.php on line 4014

Fatal error: eZ Publish did not finish its request
The execution of eZ Publish was abruptly ended, the debug output is present below.

But nothing below :)

What does this message mean and what shall i do next? Shall i rollback my database?