Hi, I'm a newbie and getting the same error but some where else.
Actually I created a new page within question bank and all of what i developed is working fine to me at my localhost (moodle 2.5) but when i tried to run the same code at another moodle (moodle. 2.5.1), it gave me the error!!
As it's working fine in moodle 2.5 so should i consider it a version upgradation issue rather than the coding issue?