I am trying to use the C++ API implementation to save an assembly (.SLDASM) as a part document (.SLDPRT), but I keep getting swGenericSaveError.

Using the following code:

void guardarModelo()
{
  //Guardar como part
  wchar_t exportedfilename[MAX_PATH], assemblyname[MAX_PATH], *pext, *pname;
  long error = 0, warning = 0;
  VARIANT_BOOL result = 0;
  CComPtr swExtension; //Extension (formato de fichero)
  swUserPreferenceIntegerValue_e part = swSaveAssemblyAsPartOptions; //Opciones de part
  //Arreglamos la extension y la ubicacion del fichero
  wcscpy(exportedfilename, filename);
  pext = wcsrchr(exportedfilename, L'\\') + 1;
  wcscpy(pext, L"-modelo\\");
  CreateDirectory(exportedfilename, NULL);
  wcscpy(assemblyname, filename);
  pname = wcsrchr(assemblyname, L'\\') + 1;
  pext = wcsrchr(assemblyname, L'.');
  wcsncpy(pext, L".SLDPRT\0", 8);
  wcscat(exportedfilename, pname);
  CComBSTR sFileName(exportedfilename);
  swModel->get_Extension(&swExtension);
  //swApp->SetUserPreferenceIntegerValue(part, swSaveAsmAsPart_AllComponents, &result);
  swExtension->SetUserPreferenceInteger(swSaveAssemblyAsPartOptions, swDetailingNoOptionSpecified, swSaveAsmAsPart_AllComponents, &result);
  swExtension->SaveAs(sFileName, swSaveAsCurrentVersion, swSaveAsOptions_Silent, NULL, &error, &warning, &result);
  if (error == 0)
  wcout << "Modelo completo guardado como part." << endl;
  else
  wcout << "ERROR " << error << " guardando modelo completo como part." << endl;
}

The code works fine when exporting the asssembly to a Parasolid binary (.x_b):

void exportarModelo()
{
  //Exportar a parasolid
  wchar_t exportedfilename[MAX_PATH], assemblyname[MAX_PATH], *pext, *pname;
  long error = 0, warning = 0; 
  VARIANT_BOOL result = 0;
  CComPtr swExtension; //Extension (formato de fichero)
  swUserPreferenceIntegerValue_e parasolid = swParasolidOutputVersion; //Opciones de Parasolid
  //Arreglamos la extension y la ubicacion del fichero
  wcscpy(exportedfilename, filename);
  pext = wcsrchr(exportedfilename, L'\\') + 1;
  wcscpy(pext, L"-modelo\\");
  CreateDirectory(exportedfilename, NULL);
  wcscpy(assemblyname, filename);
  pname = wcsrchr(assemblyname, L'\\') + 1;
  pext = wcsrchr(assemblyname, L'.');
  wcsncpy(pext, L".x_b\0", 5);
  wcscat(exportedfilename, pname);
  CComBSTR sFileName(exportedfilename);
  swModel->get_Extension(&swExtension);
  //Elegir version de Parasolid y guardar
  swApp->SetUserPreferenceIntegerValue(parasolid, swParasolidOutputVersion_150, &result);
  swExtension->SaveAs(sFileName, swSaveAsCurrentVersion, swSaveAsOptions_Silent, NULL, &error, &warning, &result);
  if (error == 0)
  wcout << "Modelo completo exportado a Parasolid." << endl;
  else
  wcout << "ERROR " << error << " exportando modelo completo a Parasolid." << endl;
}

Anyone has any idea why this isn't working?