Using File Open menu and LabView 8.5.1 freezing

[bveilleux]

I am using LabView 8.5.1and FieldPoint to control various processes. I find that if I seach for a file ("Select a file to open" window) all processes operations going on at the time freeze and will not update until the file open window is closed. Is this a bug in LabView 8.5.1 or is there another way to open files?  This is a really serious fault at PID's will no longer control which the File Open window is up;.

[DFGray]

There are a number of things which could be causing this issue.  The most common is that file I/O goes through the UI thread in LabVIEW, so it can block or seriously degrade UI activity.  If your processing is in the same loop as your front panel I/O, this could be the cause of your issue.  If this is the case, getting the processing into another loop so it is out of the UI thread will make it more deterministic and alleviate this issue.  However, without looking at your code, I am just speculating.  Do you have anything you can post?