在协同办公平台提交流程下一步时，当选人数据量大出现流转引擎服务报错的情况：
An error occured while receiving the HTTP response to http://XXX/FlowRouteEngine/FlowQueryService.svc
或
The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
解决办法：
在协同办公安装服务器上安装.net 4.5