Random ThinkGeo.Core exception

[Aaron_Douglas]

Hello,

I’m currently working on an application using ThinkGeo.UI.Wpf version 13.1.0.
Occasionally, when using the map’s Pan/Zoom tool the application will crash with the following error.

System.NullReferenceException: Object reference not set to an instance of an object.
at EhU=.ixw=.kBw=(Byte[] wkb)
at ThinkGeo.Core.Feature.GetBoundingBoxCore()
at ThinkGeo.Core.FeatureSource.GetBoundingBoxCore()
at ThinkGeo.Core.FeatureSource.GetBoundingBox()
at ThinkGeo.Core.LayerOverlay.GetBoundingBoxCore()
at ThinkGeo.Core.Overlay.GetBoundingBox()
at ThinkGeo.Core.PanZoomBarMapTool.M0Q=(Object sender, MouseButtonEventArgs e)

Do you have any thoughts as to why this might occur?
I haven’t been successful in recreating the error with any consistency unfortunately.

Thanks in advance.

Aaron

[Ben]

Hi Aaron,

It seems you are using LayerOverlay in the map, and some features in one of the FeatureLayer in that LayerOverlay is null. Can you double check that? Can you send over a code snippet about that FeatureLayer if you still see the issue?

Thanks,
Ben