TCP read error 57

[weixin3032503]

Hi, everyone:

In my graduation design,  I need to acquire the data of biscuits from a video and then send it to a VC program. I've achieved the sending process correctly and the program can receive the data. But when I wanted to send a message from the VC program to LabVIEW, the TCP  read error 57 occurred.

The TCP write VI and the TCP read VI are in different loops, and they use the same refnum. In the picture, the case structure in top while loop is the data acquiring program so I don't show them.

Can anybody teach me how to correct this program so it can receive data from the VC program? Thanks and forgive my poor English!