java - 使用 VrpXMLReader 从文件中读取 jsprit 解决方案

Question

我正在用jsprit解决VRP。我使用 VrpXmlReader 从文件中读取解决方案

    VehicleRoutingProblem.Builder problemBuilder = VehicleRoutingProblem.Builder.newInstance();

    VrpXMLReader vrpXMLReader = new VrpXMLReader(problemBuilder, solutions);
    vrpXMLReader.setSchemaValidation(false);
    vrpXMLReader.read(initialSolutionStream);
    VehicleRoutingProblem solutionProblem = problemBuilder.build();

但是当解决方案包含车辆中断时，我得到一个错误

java.lang.IllegalArgumentException: The vehicle routing roblem already contains a vehicle break with id null. Please choose unique ids for each vehicle break.

我怎样才能解决这个问题？