I have hit the following error whilst attempting to use back-up from Admin:
Course backup: Pascal Programming Language (CIS221)
Name: backup-cis221-20061102-1302.zip
Creating temporary structures
Deleting old data
Creating XML file
Writing header
Writing general info
Writing course data
Course info
Metacourse
Blocks
Sections
Writing users info. . . . . . . .
Writing categories and questions
Fatal error: Call to a member function backup() on a non-object in C:\Program Files\xampp\htdocs\question\backuplib.php on line 153
Please note that I restored a back-up from earlier version 1.4.3 to this new version and everything else seems to be OK.
Since this is a critical problem any help will be appreciated.