我正在使用 H2O 目标编码来处理我的一些因子变量。但是，我想我遇到了一个问题。
我可以轻松使用该功能，因此创建并应用了目标编码“模型”。但是，我需要能够保存所述模型并在以后使用它（例如使用实际的 H2O 模型）。
我已经用 R 的保存功能保存了模型对象，现在加载后我无法使用它（得到
ERROR: Unexpected HTTP Status code: 404 Not Found (url = http://localhost:54014/3/Frames/RTMP_sid_93aa_3?row_count=10)
water.exceptions.H2OKeyNotFoundArgumentException
[1] "water.exceptions.H2OKeyNotFoundArgumentException: Object 'RTMP_sid_93aa_3' not found for argument: key"
[2] " water.api.FramesHandler.getFromDKV(FramesHandler.java:135)"
[3] " water.api.FramesHandler.doFetch(FramesHandler.java:225)"
[4] " water.api.FramesHandler.doFetch(FramesHandler.java:220)"
[5] " water.api.FramesHandler.fetch(FramesHandler.java:199)"
[6] " sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)"
[7] " sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)"
[8] " sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)"
[9] " java.lang.reflect.Method.invoke(Method.java:497)"
[10] " water.api.Handler.handle(Handler.java:63)"
[11] " water.api.RequestServer.serve(RequestServer.java:482)"
[12] " water.api.RequestServer.doGeneric(RequestServer.java:327)"
[13] " water.api.RequestServer.doGet(RequestServer.java:251)"
[14] " javax.servlet.http.HttpServlet.service(HttpServlet.java:735)"
[15] " javax.servlet.http.HttpServlet.service(HttpServlet.java:848)"
[16] " org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)"
[17] " org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)"
[18] " org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)"
[19] " org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427)"
[20] " org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)"
[21] " org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)"
[22] " org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)"
[23] " org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)"
[24] " water.webserver.jetty8.Jetty8ServerAdapter$LoginHandler.handle(Jetty8ServerAdapter.java:119)"
[25] " org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)"
[26] " org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)"
[27] " org.eclipse.jetty.server.Server.handle(Server.java:370)"
[28] " org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)"
[29] " org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)"
[30] " org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:973)"
[31] " org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1035)"
[32] " org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:641)"
[33] " org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:231)"
[34] " org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)"
[35] " org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)"
[36] " org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)"
[37] " org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)"
[38] " java.lang.Thread.run(Thread.java:745)"
Error in .h2o.doSafeREST(h2oRestApiVersion = h2oRestApiVersion, urlSuffix = page, :
ERROR MESSAGE:
Object 'RTMP_sid_93aa_3' not found for argument: key
两个问题：
1 - 有没有办法仍然使用我以这种方式保存的编码？
2 - 我应该如何保存和加载它？