null

x.DinoQException: Error in DataModel: ((TravelTrackDB)) jsonToXDataModel() method for jsonmodel: ((null)) Error Message: (([]))

Exception thrown from jsonToXDataModel in class x.XSystemDataModel [on line number 940 of file XSystemDataModel.java]

Exception thrown from getModel in class th.co.skylogicsystem.skyframework.core.datalayer.XData [on line number 242 of file XData.java]

Exception thrown from run in class AcitytrackCityTrack17 [on line number 248 of file AcitytrackCityTrack17.java]

Exception thrown from run in class java.lang.Thread [on line number 840 of file Thread.java]