It just happend using singular, same error, couldnt close configuration window!
System.NullReferenceException: Object reference not set to an instance of an object.
at ..FindHeights(Single , Single )
at Styx.Pathing.Navigator.FindHeights(Single x, Single y)
at Singular.Extensions.FindGroundBelow(WoWUnit unit) in g:\Routines\Singular\Extensions.cs:line 224
at Singular.Extensions.HeightOffTheGround(WoWUnit u) in g:\Routines\Singular\Extensions.cs:line 209
at Singular.Extensions.IsAboveTheGround(WoWUnit u) in g:\Routines\Singular\Extensions.cs:line 189
at Singular.SingularRoutine.CheckTarget(WoWUnit unit, WoWGuid& prevGuid, String description, OnTargetChange onchg) in g:\Routines\Singular\SingularRoutine.cs:line 615
at Singular.SingularRoutine.CheckCurrentTarget() in g:\Routines\Singular\SingularRoutine.cs:line 568
at Singular.SingularRoutine.Pulse() in g:\Routines\Singular\SingularRoutine.cs:line 505
at Styx.Pulsator.Pulse(PulseFlags flags)
at Styx.CommonBot.TreeRoot.()
at Styx.CommonBot.TreeRoot.()
at Styx.CommonBot.TreeRoot.()