cannot set property

[coleman07]

No description provided.

[coleman07]

This error occurs in the ngOnDestroy method contained in the workout-runner-component. At the end of the exercises, startExerciseTimeTracking calls this.tracker.endTracking(true). In that method, currentWorkoutLog is set to null. When the app navigates to finish, the destroy method is called which calls endTracking but currentWorkoutLog is null so the first line causes an error since you are assigning the value of completed to a null. To fix it, I enclosed the entire body of endTracking in an if(this.currentWorkoutLog) clause.