Investigate NPE caused by ProgramSlot assigned to TrackProgram with track set to NULL
This caused the scheduling page (conference level) to fail in loading. It was caused by a ProgramBoundarySlot assigned to a TrackProgram, but there was no track assigned to the TrackProgram anymore. Probably some issue in cleanup on Track removal.
Submitted by Elmer van Chastelet on 25 April 2017 at 20:36