In a new installation (Moodle 2.0, Build: 20101125) I uploaded some testing users (Student1, Student2, etc.)
When I try to make a cohort named "Students", with ID "S-1", I get a blank page.
The Apache error logs say nothing, but the Moodle debugging systems shows the following error:
Fatal error: Call to undefined function can_edit_in_category() in F:\www\soporte\lib\navigationlib.php on line 3501
I'm using a Win-XP machine, with Apache 2.2.11, MySQL 5.1.22-community and PHP 5.2.8
I checked the databse with phpMyAdmin and the cohort is there, but it isn't visible through Moodle (you can't add users).
The cohort is also visible in the course (when you try to enrol students).
If I repeat the process choosing the system level for the cohort, everything works fine.
Does anybody have the same problem or do you think that something is wrong with my installation?