Campbell Scientific LoggerNet Datalogger Support Software - Manual (Page 464)

Section 14. Troubleshooting Guide
Problem: Message indicating Server Connection Lost.
Remedy : This message indicates that the main communications
software has stopped responding to the user interface screens. You
need to close down all of the applications along with the Toolbar and
start over.
14.2.2 Socket Errors
The LoggerNet Server uses TCP/IP sockets for communications. Various
problems can occur with these socket connections. Some of the most common
errors and remedies are listed below.
Maximum Number of Sockets Open
The Windows operating system has limits on the number of socket connections
that can be held open. For Windows XP this number is about 4000. For
Windows Vista/7 this number is about 16,000. For most operations this should
be more than enough to cover the open applications that use sockets. One
situation that does cause problems is using the IPPorts to communicate with
dataloggers where the socket is being opened and closed quickly. For example
if you have 20 stations on IPPorts and you do normal data collection every 5
seconds, 20 new sockets are created every 5 seconds. The normal lifetime of
the created socket is about 4 minutes leaving about 1000 active sockets at a
time. If there are other applications that use sockets, it is possible to exceed the
allowed number of sockets.
To work around this problem, either slow down the rate of data collection, or
use the Delay Hangup setting for the IP Port (accessed from the Setup Screen)
to keep the stations online.
Socket Error Messages
When you get an error message that says Socket Error and a number, check the
chart below for the type of error that occurred and what to do about it. Note
that these error messages can show up either in pop up error boxes or as part of
the LoggerNet Communications log.
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