``` std::string inputFilename1 = "E:/vtk/c12im.stl"; vtkSmartPointer<vtkSTLReader> reader1 = vtkSmartPointer<vtkSTLReader>::New(); reader1->SetFileName(inputFilename1.c_str()); reader1->Update(); std::string inputFilename2 = "E:/vtk/c1.stl"; vtkSmartPointer<vtkSTLReader> reader2 = vtkSmartPointer<vtkSTLReader>::New(); reader2->SetFileName(inputFilename2.c_str()); reader2->Update(); vtkSmartPointer<vtkTriangleFilter> filter1 = vtkSmartPointer<vtkTriangleFilter>::New(); filter1->SetInputData(reader1->GetOutput()); filter1->Update(); vtkSmartPointer<vtkTriangleFilter> filter2 = vtkSmartPointer<vtkTriangleFilter>::New(); filter2->SetInputData(reader2->GetOutput()); filter2->Update(); vtkSmartPointer<vtkBooleanOperationPolyDataFilter> boolFilter = vtkSmartPointer<vtkBooleanOperationPolyDataFilter>::New(); boolFilter->SetInputConnection(0, filter1->GetOutputPort()); boolFilter->SetInputConnection(1, filter2->GetOutputPort()); boolFilter->SetOperationToIntersection(); boolFilter->Update(); ``` Result: ``` 0xC0000005: Access conflict occurred while reading at 0xFFFFFFFFFFFFFFFF w ```