Operation Node Question

Question

Hi All, 
 Just trying out some of the new features in Update 7. 
 I might be doing something wrong but I was trying out the operation node and working with a polygon from an array of points. 
 Then trying to just do some random operations. One question I have is with the order of operations. 
 So for example if I take the polygons into the Operation node and set it to IsPlanar then flatten all works, but if I flatten first then try to do a IsPlanar it fails? 
 This might be a bit clearer: 
 
 Maybe it is just a different approach to the same outcome. 
 Anyway just thought I would ask. 
 Thanks 
 Wayne

Fullscreen 
 OperationNode.txt 
 Download 
 
 transaction 1 stateChange 'Add baseCS'
{
 gcModel
 {
 node User.Objects.baseCS Bentley.GC.NodeTypes.CoordinateSystem
 {
 Technique = 'AtDGNModelOrigin';
 DGNModelName = 'Design Model';
 SymbolSize = 1.0;
 GCModelPropertyDirection = PropertyDirection.None;
 GraphLocation = {42.667, 40.0};
 }
 }
}

transaction 2 stateChange 'Add point1'
{
 gcModel
 {
 node User.Objects.point1 Bentley.GC.NodeTypes.Point
 {
 Technique = 'ByCartesianCoordinates';
 CoordinateSystem = baseCS;
 XTranslation = Series(0,10000,1000);
 YTranslation = Series(0,10000,2000);
 ZTranslation = 0;
 Replication = ReplicationOption.AllCombinations;
 GraphLocation = {330.787, 26.142, 0.0, 156.43};
 }
 }
}

transaction 3 stateChange 'Add polygon2'
{
 gcModel
 {
 node User.Objects.polygon2 Bentley.GC.NodeTypes.Polygon
 {
 Technique = 'ByPointGrid';
 Points = point1;
 FacetOption = FacetOption.Quads;
 PlaneIndex = 1;
 UClosed = false;
 VClosed = false;
 GraphLocation = {589.13, 88.774, 0.0, 117.37};
 }
 }
}

transaction 4 stateChange 'Add operation1, operation2, operation3, operation4'
{
 gcModel
 {
 node User.Objects.operation1 Bentley.GC.NodeTypes.Operation
 {
 Technique = 'Default';
 Subject = polygon2;
 OperatorKey = 'CurveGeometry.IsPlanar';
 GraphLocation = {868.269, 219.342, 174.0, 125.83};
 }
 node User.Objects.operation3 Bentley.GC.NodeTypes.Operation
 {
 Technique = 'Default';
 Subject = polygon2.Flatten();
 OperatorKey = 'object[].Flatten';
 GraphLocation = {866.139, 63.525, 0.0, 125.83};
 }
 node User.Objects.operation4 Bentley.GC.NodeTypes.Operation
 {
 Technique = 'Default';
 Subject = operation3;
 OperatorKey = 'CurveGeometry.IsPlanar';
 GraphLocation = {1094.694, 50.858, 0.0, 138.608};
 }
 node User.Objects.operation2 Bentley.GC.NodeTypes.Operation
 {
 Technique = 'Default';
 Subject = operation1;
 OperatorKey = 'object[].Flatten';
 GraphLocation = {1102.002, 217.075, 0.0, 125.83};
 }
 }
}

transaction 5 stateChange 'Add value3'
{
 gcModel
 {
 node User.Objects.value3 Bentley.GC.NodeTypes.Value
 {
 Technique = 'Default';
 Value = polygon2.Flatten();
 GraphLocation = {862.26, -82.913, 0.0, 123.83};
 }
 }
}

transaction 6 stateChange 'Add value4'
{
 gcModel
 {
 node User.Objects.value4 Bentley.GC.NodeTypes.Value
 {
 Technique = 'Default';
 Value = value3.Value.IsPlanar;
 GraphLocation = {1097.022, -82.521, 0.0, 123.83};
 }
 }
}