I ma not sure if you have to use TCP/IP. What if Bob had a seperate loop that just used UDP to repeatedly broadcast a count that is incremented each time a read completes.
Alice could listen for the broadcast and and act depending on if it saw Bob count change in a resonable amount of time. The next variation I would concider is using to use VI server (based on TCP/IP but the low level stuff is done for you). Bob could invoke a VI on Alice that told her to start. If she does not hear from Bob to stop she just keep blasting away. Otherwise the approach you have outlined MAY work. I can not say the will not be complications becuase I ussaully write my code to avoid errors so I can not speak from experience. I seem to remember people having some trouble with restarting/reopening TCP sessions over extended periods of time. That may have been some time ago, not sure on that. I hope this help. Fire away if you have follow-ups. Ben <a href="http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=261&HRedirected=True&HUserId=101_3529&RFORMNUMBER=6";>Ben Rayner</a> <a href=" http://volt.ni.com/niwc/common.jsp?page=products_certification_cld&node=10638";> Certified LabVIEW Developer </a> www.DSAutomation.com
