What is the return code 54 on output distribution?

This is coming from the FileRead.exe it appears.

Windows exit code 54 The network is busy. 

The request is timing out.  We ask the Agent for the list of files, but instead it times out and return Exit Code 54.

Here is a website that lists windows return codes and the meanings:

http://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx