TIA Openness: Exporting SCL block to XML error

public static void ReadSCL()

{

foreach (Device device in project.Devices)

{

if (device.TypeIdentifier == "System:Device.S71200")

{

foreach (DeviceItem deviceItem in device.DeviceItems)

{

if (deviceItem.Name.Contains("PLC"))

{

SoftwareContainer softwareContainer = ((IEngineeringServiceProvider)deviceItem).GetService<SoftwareContainer>();

if (softwareContainer != null)

{

PlcSoftware plcSoftware = softwareContainer.Software as PlcSoftware;

PlcBlock plcBlock = plcSoftware.BlockGroup.Blocks.Find("FC");

if (plcBlock != null)

{

try

{

plcBlock.Export(new FileInfo(string.Format(@"D:\Samples\{0}.xml", plcBlock.Name)), ExportOptions.WithDefaults);

}

catch (Exception ex)

{

Console.WriteLine(ex.ToString());

}

}

}

}

}

}

}

}

 I receive this error: (See attachment)

The inside of the FC I'm trying to open looks like this: