update digital line.vi is this a standard vi and if so where is it found?

[Jimmybooya]

I took over an instrument from another graduate student who has successfully graduated.  The control software worked fine until last week when I had to power down the system.  When I brought it back up the software says it cant find the update digital line.vi .  I searched for this and came up empty.  I emailed the guy who wrote the software and he said it sounded like a normal sub vi and to check the NI DAQ for this.  I did and havent come up with a update digital line.vi.  I tried using a write to digital line vi to replace it, and the software will not operate with this, it still says the vi is missing.  Is this a standard vi, and if so where is it found?  What would have caused it to dissapear from me just powering down the instrument?

Thanks
Mark
 

[Mark_E]

Hi Mark,

The file “update digital line.vi” isn’t a shipping VI in LabVIEW 8.5. It’s probably a custom VI, and if so, it won’t be located in the regular folders and won’t be found by a LabVIEW search. I would suggest doing a Windows search for the file to see if it can be found anywhere on your computer.

When a VI is loaded into memory, so are its subVIs. With a VI open, you can move the file location of a subVI and the main VI will still run because all of the necessary pieces are in memory. When the VI is closed, the memory is cleared and when it’s opened again, LabVIEW may not be able to find the subVI. That’s how it could still run even if the subVI was moved or deleted from your machine.