The wince program reports the error "Unable to read data from the transmission connection" when calling service interfaces such as Webservice.
Reason: It is generally caused by the connection between the computer and the wince device through the usb during debugging.
Solution: (1) Pull out the USB cable when calling the interface (it can also be debugged normally at this time).
(2) Check whether the Ethernet IP of the debugging PC is in the same network segment as the wince device. If it is not in the same network segment, or the PC Ethernet cannot access the network, an error will be reported.