Getting "temp is null" error

I have a project using dhtmlxscheduler version 4 that is in final testing. Suddenly the scheduler started giving the error “temp is null” when loading the data. It didn’t do this before today, and the project hasn’t been changed. Can you tell me what would cause this error message from dhtmlxscheduler.js?

Here is a URL:


I figured it out - my ending date data had a bug. Thanks anyway.