Losing smart camera connection when using web server on NI1762 smart camera

Hi
I am using 2 smart cameras ( old NI1762 and the new NI1772) with Vision builder 2011 .
I am trying to find a way to retrieve data and image to a Visual Basic 6 application. i could not find an elegant way to do it , so instead , i am sending TCP command to the smart camera as an input and the smart camera send me back a TCP command a as an output. by this way i could communicate with the smart camera . For transferring images I could not use the TCP step , so I turned on the smart camera web server to get the image by a browser Object . But the problem is that everything is going well with the TCP, but when I turned on the web server and try to communicate with it, sometimes I loose the connection with the smart camera. That is happened with the 1762 smart camera. But when I use the NI1772 it rarely happed.
Please help me. is there any other elegant way to communicate with the smart camera , and if a TCP and web server is a solution , Why the NI1762 web server is not stable ? Why i am losing the connection when browsing to the inspection page???
Thanx

Previous versions of Vision Builder had a COM library that you could use from Visual Basic 6 or other environments and talk over the network to a Smart Camera running Vision Builder AI and control its execution just how you are requesting. In more recent versions, this has been replaced by a native .NET and LabVIEW-native API that is much more fully featured. Unfortunately, I do not think the older COM mechanism is still available/supported (but I certainly could be wrong...).
However, one avenue you may wish to persue would be to call into the .NET interface from Visual Basic 6. Microsoft designed .NET to allow COM interoperibility in both directions (.NET can call into COM libraries and COM libraries can call into .NET). Take a look at the following document from Microsoft:
http://msdn.microsoft.com/en-us/library/zsfww439(v=vs.85).aspx
You could then look at any of the .NET (C#) examples to get an idea of the API:
C:\Program Files (x86)\National Instruments\Vision Builder AI 2011\API Examples\dotNET Examples
Eric

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Apple Support reports that they have no training in the port forwarding features of the Time Capule or Airport products, and cannot help me resolve the issue because of that. So, I have a $300 router that apparently cannot perform a simple routing function (download through a forwarded port), that I cannot troubleshoot (because Airport software v7 is an epic fail in that regard), made by a company who cannot support it - and everything this $300 device is doing can be done by a $50 device with a $100 external hard drive?
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Excellent summary.. I think you have covered all the salient points most thoroughly.
Port forwarding on the TC I would put into the category of "epic fail"
I have a nasty feeling it just doesn't work in many cases. Clearly from your situation the port is forwarded correctly.. it is the actual download that is causing the device to crash.. which is probably not the port forwarding itself that is at fault but rather the external link and opening another port for the download to happen.
Many of the issues were caused by using icloud and btmm.. which would work a lot better btw. Although the hassle there is needing to offer that as a service to any Tom Dick or Harry.
Let me suggest a work around or other things to try.
I also have an older 500GB 1st generation Time Capsule. I set it up with the same config as my 2TB TC, and it shows the exact same behavior - internet disconnects upon initiating a file download through a forwarded port.
Use 5.6 utility.. more info below. And take the firmware of this unit (Gen1) back to 7.5.2 (before icloud mess ups in 7.6).
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You might also find downloading via http is not as reliable as using FTP.. FTP is a better and more efficient protocol. It should be no problem to setup ftp server on the mac pro to allow download via ftp even with a browser.
But in the end.. your $50 router suggestion.. well perhaps a little more than that.. $80-100 will work very well.. also this router can be setup with a Hard Disk and offer the files to the internet via FTP.. without needing full network access to your internal network.
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1. Download 5.6 for Lion.
http://support.apple.com/kb/DL1482
Click to open the dmg but do not attempt to install the pkg.. it won't work anyway.
2. Download and install unpkg.
http://www.timdoug.com/unpkg/
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You cannot uninstall 6.1 (now 6.2 if you updated) so don't try.. and you cannot or should not run them both at the same time.. so just ignore the toyland version.. the plastic hammer.. and start using 5.6.. a real tool.
For screen shots see this post.
https://discussions.apple.com/thread/4668746?tstart=0

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