没有做个tcp的控制，网上搜索有解决办法，你可以试试：
Solution:
Error 56 is generated when an operation exceeds the user-specified time limit. This error is caused by the LabVIEW code not receiving a network response within the defined time limit. This solution may also be relevant if you experience Error 66 – "LabVIEW: The network connection was closed by the peer" when the server reaches a timeout limit, and closes the connection.
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Solution:
Error 56 is generated when an operation exceeds the user-specified time limit. This error is caused by the LabVIEW code not receiving a network response within the defined time limit. This solution may also be relevant if you experience Error 66 – "LabVIEW: The network connection was closed by the peer" when the server reaches a timeout limit, and closes the connection.
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