Why does my procedure raise an error when exporting a GroupLayer to a shapefile or geodatabase? [closed]

Question

I am facing some problems while exporting in_memory group layers to shapefile. but this code is successfully exporting any single in_memory layer to any type like shapefile gdb etc. here is my code.

public static ILayer exportLayer(IPropertySet properties, WorkspaceType type, IFeatureLayer featureLayer) throws Exception
{
    IFeatureClass featureClass = featureLayer.getFeatureClass();

    IWorkspace sourceWorkspace = new Workspace(((IDataset)featureLayer).getWorkspace());
    IWorkspace targetWorkspace = WorkspaceFactory.getFactory(type, properties);

    IWorkspaceName sourceWorkspaceName = getWorkspaceName(sourceWorkspace);
    IWorkspaceName targetWorkspaceName = getWorkspaceName(targetWorkspace);

    IFeatureClassName sourceFeatureClassName = new FeatureClassName();
    IDatasetName sourceDatasetName = (IDatasetName) sourceFeatureClassName;
    sourceDatasetName.setName(((IDataset)featureLayer).getName());
    sourceDatasetName.setWorkspaceNameByRef(sourceWorkspaceName);

    // Create a name object for the FGDB feature class and cast it to the
    // IDatasetName interface.
    IFeatureClassName targetFeatureClassName = new FeatureClassName();
    IDatasetName targetDatasetName = (IDatasetName) targetFeatureClassName;
    targetDatasetName.setName((String) properties.getProperty("LAYER"));
    targetDatasetName.setWorkspaceNameByRef(targetWorkspaceName);

    // Create the objects and references necessary for field validation.
    IFieldChecker fieldChecker = new FieldChecker();
    IFields sourceFields = featureClass.getFields();
    IFields[] targetFields = new IFields[1];
    IEnumFieldError[] enumFieldError = new IEnumFieldError[1];

    // Set the required properties for the IFieldChecker interface.
    fieldChecker.setInputWorkspace(sourceWorkspace);
    fieldChecker.setValidateWorkspaceByRef(targetWorkspace);

    // Validate the fields and check for errors.
    fieldChecker.validate(sourceFields, enumFieldError, targetFields);
    if (enumFieldError != null)
    {
        /* handle the field errors */
    }

    // Find the shape field.
    String shapeFieldName = featureClass.getShapeFieldName();
    int shapeFieldIndex = featureClass.findField(shapeFieldName);
    IField shapeField = sourceFields.getField(shapeFieldIndex);

    // Get the geometry definition from the shape field and clone it.
    IGeometryDef geometryDef = shapeField.getGeometryDef();
    IClone geometryDefClone = (IClone) geometryDef;
    IClone targetGeometryDefClone = geometryDefClone.esri_clone();
    IGeometryDef targetGeometryDef = new GeometryDef(targetGeometryDefClone);

    // Create the converter and run the conversion.
    IFeatureDataConverter featureDataConverter = new FeatureDataConverter();
    IEnumInvalidObject enumInvalidObject = featureDataConverter
            .convertFeatureClass(sourceFeatureClassName, null, null,
                    targetFeatureClassName, targetGeometryDef,
                    targetFields[0], "", 1000, 0);

    // Check for errors.
    IInvalidObjectInfo invalidObjectInfo = null;
    enumInvalidObject.reset();
    List<Integer> invalidObjects = new ArrayList<Integer>();
    while ((invalidObjectInfo = enumInvalidObject.next()) != null)
    {
        invalidObjects.add(invalidObjectInfo.getInvalidObjectID());
    }

    IFeatureLayer targetLayer = new FeatureLayer();
    targetLayer.setFeatureClassByRef(((Workspace)targetWorkspace).openFeatureClass(targetDatasetName.getName()));
    targetLayer.setName(targetDatasetName.getName());

    return targetLayer;
}

gets automation exception when trying to convert the data featureDataConverter .convertFeatureClass(sourceFeatureClassName, null, null, targetFeatureClassName, targetGeometryDef, targetFields[0], "", 1000, 0);

Thanks for helping me out.