WDSL after import the generated interface definition

 
Dm=interface (IInvokable) 
[' {EBB2D257-0494 - BE5C - 1055 - EF4FF09B1A56} '] 

//always unwrap: 
//- Input element wrapper name does not match the operation 's name 
The function echo (const echoRequest: echoRequest) : echoResponse; Stdcall; 
end; 

Access interface code:

 
_CancelechoResponse:=dmz2. Echo (_CancelechoRequest) 

Caught the return information of

Now through Fiddler 4 caught, you can see the interface the information returned, but _CancelechoResponse didn't receive any information in it;

Program error screenshots, the debug is on a visit to CancelechoResponse when


Confirmed several CancelechoResponse inside the initialization I initialization?
To find the problem for a long time, really can't, I ask you advice