Hardware configuration is as follows, computer: lenovo L460; Operating system: Windows 7 enterprise edition system installed system (company); 8 g memory: operating system: 64, tried to take other colleague's computer operation, the request message is displayed, tried L480, L450, tried win10 system, also have no problem, reshipment system, message display is still empty, but it is strange that a use case file does have a message for details of the request and return message is displayed correctly, the problem is that one thousand cases to modify, after that to save the empty Wen Cun caught,