Hi,
I've just tried to deserialize an overlay that contains an isoline feature using the GeoSerializer. The following Argument Exception error was produced by the deserialize method (see attachment IsolineDeserializeError.png).
The Serialize method does not produce an error with this approach, but it takes forever. Subsequently, I've noticed that the isoline overlay produces very large files that are approximately 10 times the size of a file containing shape, feature and grid overlays. When I look at a save file and examine the Isoline Overlay, there are several hundred thousand (yes, ~400,000) ArrayItem tags. I believe this has something to do with the problem.
Regards,
Damian