Export 2D Drawing to DXF and DWG using VB API

Hello everyone,

We use Creo10.0.

I am able to export a DWG but certain parts of the drawing are missing. e.g. the title block.
Does someone know a solution. maybe it is relate to me using CCpfcDWG3DExportInstructions but no other instrutions i tested deliver a openable DWG.

 public static string ExportToDwg(string inputFilePath)
 {
 if (string.IsNullOrWhiteSpace(inputFilePath))
 throw new ArgumentNullException(nameof(inputFilePath), "No input file path provided.");

 if (!System.IO.File.Exists(inputFilePath))
 throw new ArgumentException($"File path does not exist: {inputFilePath}");

 Interop interop = new Interop();
 IpfcAsyncConnection connection = interop.Connection;

 if (connection == null)
 throw new Exception("Invalid Creo connection.");

 FileInformation fileInfo = new FileInformation(inputFilePath);
 IpfcBaseSession session = interop.Session;
 Interop.ClearSessionCache(session);
 session.ChangeDirectory(fileInfo.directory);
 // Apply DWG Settings
 Interop.ApplySettigns(session, "dwgSettings");

 try
 {
 IpfcModel model = interop.GetModel(inputFilePath);
 if (model == null)
 throw new Exception("Model could not be retrieved.");

 if (model.Type != (int)EpfcModelType.EpfcMDL_DRAWING)
 throw new ArgumentException("Given model is not of type Drawing");

 // Using Creo API for DWG Export

 IpfcDWG3DExportInstructions dwgExportInstructions = new CCpfcDWG3DExportInstructions().Create();
 if (File.Exists(fileInfo.exportedDWGFilePath))
 {
 File.SetAttributes(fileInfo.exportedDWGFilePath, FileAttributes.Normal);
 System.IO.File.Delete(fileInfo.exportedDWGFilePath);
 }

 // Export DWG
 Logger.Info("Trying to export DWG.");
 model.Export(fileInfo.exportedDWGFilePath, (IpfcExportInstructions)dwgExportInstructions);

 if (File.Exists(fileInfo.exportedDWGFilePath))
 {
 Logger.Info("DWG Export successfully.");
 }

 if (File.Exists(fileInfo.dwgPathForVault))
 {
 File.SetAttributes(fileInfo.dwgPathForVault, FileAttributes.Normal);
 File.Delete(fileInfo.dwgPathForVault);
 }
 System.IO.File.Move(fileInfo.exportedDWGFilePath, fileInfo.dwgPathForVault);


 // Ensure DWG file is created
 if (!System.IO.File.Exists(fileInfo.dwgPathForVault))
 throw new Exception("DWG file was not created. Check Creo log for errors.");

 Logger.Info("DWG Export completed successfully.");
 connection.Disconnect(5);
 return fileInfo.dwgPathForVault;
 }
 catch (Exception ex)
 {
 try { Interop.ClearSessionCache(session); } catch { }
 throw;
 }
 }

I apply settings to creo like this:

public static void ApplySettigns(IpfcBaseSession session, string settingName)
{
 ConfigReader configReader = new ConfigReader();
 Dictionary<string, string> settings = new Dictionary<string, string>();
 try
 {
 settings = configReader.GetSettings(settingName);
 }
 catch (ArgumentException ex)
 {
 Logger.Error(ex.Message);
 }

 if (settings.Count > 0)
 {
 foreach (KeyValuePair<string, string> setting in settings)
 {
 try
 {
 // configOptionName and configOptionValue
 session.SetConfigOption(setting.Key, setting.Value);
 }
 catch (Exception ex)
 {
 Logger.Error($"Could not set {setting.Key} because of: {ex.Message}");
 }
 }
 }
}

 These are my settings but in the export log they seem not to be applied:

	<drawingSettings>
		<add key="enable_popup_help"	value="no" />
		<add key="display_axes"			value="no" />
		<add key="display_coord_sys"	value="no" />
		<add key="display_planes"		value="no" />
		<add key="display_points"		value="no" />
		<add key="allow_mfg_in_assem_mode"		value="yes" />
	</drawingSettings>	
<dwgSettings>
		<!--https://support.ptc.com/help/creo/creo_pma/r8.0/usascii/#page/data_exchange/interface/Controlling_DXF_and_DWG_Export.html-->
		<add key="DWG_EXPORT_FORMAT" value="2018" />
		<add key="INTF2D_OUT_DXF_MAPPING_FILE" value="C:\PTC\cadpool\Kelvion_NOB\parametric\data\Kelvion_NOB\config\profile_dir\sut_dxf_export.pro" />
		<add key="DXF_OUT_DRAWING_SCALE" value="NO" />
		<add key="DXF_OUT_SCALE_VIEWS" value="NO" />
		<add key="DXF_OUT_SEP_DIM_W_BREAKS" value="NO" />
		<add key="INTF2D_OUT_STROKE_TEXT" value="All" />
		<add key="INTF2D_OUT_ACAD_SPLINES" value="AS_SPLINE" />
		<add key="INTF2D_OUT_ACAD_HATCHES" value="AS_HATCH" />
		<add key="INTF_OUT_LAYER" value="NONE" />
		<add key="INTF2D_OUT_ACAD_MTEXT" value="YES" />
		<add key="INTF2D_OUT_ACAD_UNICODE" value="NO" />
		<add key="INTF2D_OUT_ACAD_TEXT_ALIGN" value="AS_IS" />
		<add key="INTF2D_OUT_PNT_ENT" value="NO" />
		<add key="INTF2D_OUT_OPEN_LOG_WINDOW" value="NO" />
	</dwgSettings>

I much appreciate your help!