Hi,

Just a beginner question about GeoMason: when I want to use check points, I
got the following:

java.io.NotSerializableException:
com.vividsolutions.jts.index.quadtree.Quadtree
       - field (class "sim.field.geo.GeomVectorField", name: "spatialIndex",
type: "class com.vividsolutions.jts.index.quadtree.Quadtree")
       - object (class "sim.field.geo.GeomVectorField",
sim.field.geo.GeomVectorField@122a7b5)
       - field (class "sim.app.WebGalaSim.WebGalaSim", name: "junctions",
type: "class sim.field.geo.GeomVectorField")
       - root object (class "sim.app.WebGalaSim.WebGalaSim",
sim.app.WebGalaSim.WebGalaSim@1188793)
       at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
       at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
       at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)
       at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:141
6)
       at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
       at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
       at
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)
       at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:141
6)
       at
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
       at
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
       at sim.engine.SimState.writeToCheckpoint(SimState.java:248)
       at sim.engine.SimState.writeToCheckpoint(SimState.java:261)
       at sim.app.WebGalaSim.WebGalaSim.main(WebGalaSim.java:199)


Is there a way to solve the problem?

Thanks

Francesco