Open and Close a command line exec via OpenG.lib in seperate VIs

Hi,
I'm aiming to perform tests on my UUT - over a command line based executable which established a USB connection, so - sendings commands and checking the return string.
So far i'm reusing the pipeNight.vi which is shared in the following post.
http://forums.ni.com/t5/LabVIEW/How-to-pass-input-to-a-DOS-executable-that-is-running-in/m-p/1763182...
However i wish expand from LabVIEW and utilise NI-TestStand sequence files to ramp up the test coverage and perform the tests automatically.
The issue i've encountered - every time i call the pipeNight.vi from a TestStand sequence Step, the USB connection is build up and torn down.
Although i'm not encountering any performance issues to date, i would ultimately like to open a session (i.e.establish the usb connection) - at the beginning of a sequence file, send a bunch or commands and check return strings, before closing the session at the end of the sequence file. This is surely a more effecient and elegant solution.
Is it somehow possible to split the pipeNight.vi into several VIs to realise this objective?
- Open
- Write/Read
- Close
i'd appreciate and help or alternatice solutions on this!
B.Regards
Kech
Solved!
Go to Solution.

I had tried to explain in my initial post, that if i call the pipeNight.vi from a TestStand sequence file step, then establishes a USB connection and tears it done - for every command that i send/ respectively every sequence step that i run in TestStand. As i envisage multiple (several hundred) test steps, i woul like to improve effeciency by establishing the ESB connection once instead of multiple times.

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