call library function holding up VI execution

[Nacree]

Hello,

I am calling functions from a dll to access a frame grabber camera based on an input trigger.  I can make the function calls using the Call Library Function just fine my only problem is that the function holds up the entire VI while it is waiting for a trigger.   Is there any way to solve this?  The frames we are trying to grab only happen once every couple of seconds and the VI does not respond inbetween grabs.

Any help would be appreciated.

[mikeporter]

You can put the frame grabber functionality in a separate loop that communicates with the interface through a functional global or something of that sort.

Mike...

[Jarrod_S.]

Also try setting the Call Library Function Node to run reentrantly, rather than in the UI Thread. Making this change will turn the node yellow.

If your Call Library Function Node is set to run in the User Interface Thread (the default), then LabVIEW's User Interface will be unresponsive until the node finishes executing.