Error when Export a StructMember .

When I Export Gc StructMenber to new model,I got an error message .Please help me! Thanks.

transaction 1 stateChange '添加 CS, line1, point1, point2'
{
    gcModel
    {
        node User.Objects.CS Bentley.GC.NodeTypes.CoordinateSystem
        {
            Technique                 = 'AtDGNModelOrigin';
            DGNModelName              = 'Design Model';
            GraphLocation             = {15.92, -114.08, 174.0, 122.26};
        }
        node User.Objects.point1 Bentley.GC.NodeTypes.Point
        {
            Technique                 = 'ByCartesianCoordinates';
            CoordinateSystem          = CS;
            XTranslation              = <free> 4500.0;
            YTranslation              = <free> 0.0;
            ZTranslation              = <free> 0.0;
            GraphLocation             = <auto> {40.0, 40.0};
        }
        node User.Objects.point2 Bentley.GC.NodeTypes.Point
        {
            Technique                 = 'ByCartesianCoordinates';
            CoordinateSystem          = CS;
            XTranslation              = <free> 6000.0;
            YTranslation              = <free> 3000.0;
            ZTranslation              = <free> 7500.0;
            GraphLocation             = <auto> {40.0, 246.21};
        }
    }
}

transaction 2 stateChange '添加 sName'
{
    gcModel
    {
        node User.Objects.sName Bentley.GC.NodeTypes.Value
        {
            Technique                 = 'Default';
            Value                     = '1\CN_TN\TN175X175';
            GraphLocation             = <auto> {289.92, -114.08};
        }
    }
}

transaction 3 stateChange '添加 structuralMember1'
{
    gcModel
    {
        node User.Objects.structuralMember1 Bentley.GC.NodeTypes.StructuralMember
        {
            Technique                 = 'ByFunction';
            Function                  = function()
                                        {
                                        /*
                                        CatalogItem               = {'Steel Column','柱子'};
                                        StartPoint                = point1;
                                        EndPoint                  = point2;
                                        CrossSection              = '1\CN_HN\HN248X124X5X8';
                                        Part                      = {'Steel', 'Columns_BracedFrame'};
                                        StructuralFramingCommon_sectionname = '1\CN_HN\HN248X124X5X8';
                                        StructuralLocation_ColumnLocation = 'N/A';
                                        */
                                        string myCatalog = {'Steel Column','柱子'};
                                        string myPart  = {'Steel', 'Columns_BracedFrame'};
                                        StructuralMember sMember01=new StructuralMember (this);
                                        sMember01.ByPoints (myCatalog ,point1 ,point2 ,PlacementPoint .BottomRight ,sName ,myPart ,90);
                                         
                                        };
            GraphLocation             = {286.464, 43.744, 0.0, 166.21};
        }
    }
}

transaction 4 stateChange '添加 export1'
{
    gcModel
    {
        node User.Objects.export1 Bentley.GC.NodeTypes.Export
        {
            Technique                 = 'ExportNodesAsElementsToAnotherModelWithinActiveDesignFile';
            NodesToExport             = structuralMember1;
            DGNModelName              = '111';
            AutoProduceOnUpdate       = false;
            GraphLocation             = {288.755, 249.52, 0.0, 160.91};
        }
    }
}