Uncaught TypeError: scheduler._skin_init is not a function

Scheduler Javascript
#1

I am getting the following error when integrated timeline(ext/dhtmlxscheduler_timeline.js) and use scheduler.createTimelineView() method in my html file.

Uncaught TypeError: scheduler._skin_init is not a function

#2

Hi,
what version of a scheduler do you use?
probably you have different versions of dhtmlxscheduler.js and dhtmlxscheduler_timeline.js