Adding MKPolyLine NSInvalidArgumentException - iphone

Question

I'm trying to add MKPolyLine to my mapView. But got error: NSInvalidArgumentException', reason: '-[MKPolylineView boundingMapRect]
My code:
- (void)addRoad {
[self loadRoude];
[self.mapView addOverlay:self.routeLine];
}
- (void)loadRoude{
MKMapPoint northEastPoint = MKMapPointForCoordinate(self.mapView.userLocation.coordinate);
MKMapPoint southWestPoint = MKMapPointMake(52.142391, 21.055641);
MKMapPoint* pointArr = malloc(sizeof(CLLocationCoordinate2D) * 2);
pointArr[0] = northEastPoint;
pointArr[1] = southWestPoint;
self.routeLine = [MKPolyline polylineWithPoints:pointArr count:2];
_routeRect = MKMapRectMake(southWestPoint.x, southWestPoint.y, northEastPoint.x - southWestPoint.x, northEastPoint.y - southWestPoint.y);
free(pointArr);
}
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
MKOverlayView* overlayView = nil;
if(overlay == self.routeLine)
{
if(nil == self.routeLineView)
{
self.routeLineView = [[MKPolylineView alloc] initWithPolyline:self.routeLine];
self.routeLineView.fillColor = [UIColor redColor];
self.routeLineView.strokeColor = [UIColor redColor];
self.routeLineView.lineWidth = 3;
}
overlayView = self.routeLineView;
}
return overlayView;
}
There is my problem?
EDIT
NSLog of self.routeLineView shows me : outeLiveView = <MKPolylineView: 0x7c956d0; frame = (0 0; 0 0); opaque = NO; layer = <MKOverlayClusterProxyLayer: 0x7c97eb0>> Is this normal?
EDIT2
NSLog(#"pointArr[0]x = %f",pointArr[0].x);
NSLog(#"pointArr[0]y = %f",pointArr[0].y);
NSLog(#"pointArr[1]x = %f",pointArr[1].x);
NSLog(#"pointArr[1]y = %f",pointArr[1].y);
show:
pointArr[0]x = 149891376.014222
pointArr[0]y = 88510604.996837
pointArr[1]x = 149917951.870020
pointArr[1]y = 88495551.883086
That mean my pointers array have no nil objects. I'm really in shock

Answer 1

From Apple's documentation:
NSInvalidArgumentException: Name of an exception that occurs when you
pass an invalid argument to a method, such as a nil pointer where a
non-nil object is required. Available in Mac OS X v10.0 and later.
Check the values you are using to initialize routeLineView or any other MKPolylineView objects. One is probably nil.