Please hekp me fix Error(-1073807346)

[Phakhawat23]

I just a beginner of Labview Program.

I use Labview to control Power supply NI USB6003 and Arduino board (assume this device for send a datagram command) Now I already combine this 3 program to 1 UI.

Currently I already get a error (ERR(-1073807346) in Visa write.(That I already attached on figured) That I cannot send this command in Labview to ON or OFF Power Supply. How can I just solve this problem. Please let me know. Thank you for your sharing.

Email : paradise2new@gmail.com

[GerdW]

Hi Phakhawat,

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@Phakhawat23 wrote:

Currently I already get a error (ERR(-1073807346) in Visa write.(That I already attached on figured) That I cannot send this command in Labview to ON or OFF Power Supply. How can I just solve this problem.

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Is the reference valid before the first VISA function?

There is a "default if unwired" tunnel used with this reference: you should NEVER do this with any kind of reference!

Two more notes:

1. Instead of attaching images of parts of block diagrams you should attach real code (aka the VI)…
2. It is a bad idea to post email addresses in the open wild…

[altenbach]

Your visa reference is held in a shift register, but is not wired across all cases of the event structure. If such a case executes, the reference is irreversibly lost and replaced with a generic default that has no meaning.

Wire it across all events so the output tunnel is solid.

[billko]

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@altenbach wrote:

Your visa reference is held in a shift register, but is not wired across all cases of the event structure. If such a case executes, the reference is irreversibly lost and replaced with a generic default that has no meaning.

Wire it across all events so the output tunnel is solid.

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To facilitate this, change the "Use Default If Unwired" property of the VISA ref output tunnel to "Linked Input Tunnel --> Create & Wire Unwired Cases".  Your cursor turns into a spool of wire with an empty square.  If the input tunnel blinks when the cursor is hovering over it, it is a candidate for linking.  Click on the input tunnel that you want to connect to.  This will automatically do what @altenbach recommended.