Repeating Fatal Error

[xanstin 1]

What does this mean. I pulled this from the Error Log it occurred on 3 separate instances as I tried to restart VOXATC.

 

ATSO exception Object reference not set to an instance of an object.    at com.intworkings.voxatc.ProcedureAirspaceRoute.RationalizeAltitude(ProcedureSegment ps, Position startPos, Position posIn)

   at com.intworkings.voxatc.ProcedureAirspaceRoute.GetNextPPosition(Position pos)

   at com.intworkings.voxatc.ProcedureAirspaceRoute.GetNextPosition(Position posIn)

   at com.intworkings.voxatc.ASSTransiting.SetupNextLeg()

   at com.intworkings.voxatc.ASSTransiting.Moved(Position posIn)

   at com.intworkings.voxatc.ASSDepartingBeforeFirstSidWP.Moved(Position posIn)

   at com.intworkings.voxatc.ATSO.CheckMovements()

   at com.intworkings.voxatc.ATSO.Run()

   at com.intworkings.voxatc.TerminalATSO.Run()

   at com.intworkings.voxatc.ATSOWorker.Run()

Log Start 05/17/2014 22:16:39

 

[vonmar 121]

Did you get this during installation?

[xanstin 1]

No its been working fine for weeks then this started. I was at Boston Logan trying to fly to JFK.