Instrument Control (GPIB, Serial, VISA, IVI)

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GPIB and LAN devices link checks

Hi
I am trying to communicate with 8-10 electronic instruments(most of them are agilent) using labview. Among them 4 devices need GPIB interface and rest all can access using web interface.By following the information provided in net and in ni forums i just downloaded the available instrument drivers to my application and tried to establish communication with them from GUI.My first and basic task is to change the button color of the respected instrument to red/green by checking their connectivity.As i am new to GPIB & LAN instruments usage, Here i got problem with GPIB connectivity. I am attaching  sample VIs of both GPIB and Lan instruments to this mail.But i don't know that i am coding in a rite way or not.So please help me out by checking the code and suggest any simple methods if any.Thanks in advance.

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Please open the initialize.vi to see that it just opens the device via visa, and does the idn check already.

greetings from the Netherlands
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