Hi PJ M, You said that "In between, the execution is "halted" on the Open VI ref". Could that be that the vi that you called by reference is still being used somewhere(running, not finish task) at the time you want to open it's reference the second time? Using call by reference is just like you drop in a subvi, you have to wait for it to finish. Just another wild guess. Irene > ----- Original Message ----- > From: PJ M > To: Irene He ; LABVIEW INFO > Sent: Monday, January 26, 2004 5:16 PM > Subject: Re: Fw: [A] Call by Ref & Open VI Ref > Question > > > Irene, > > There is indeed something happening in my state > machine that might be part of the problem. I test > the issue separetly (slider connect to a change > detector (the one from OpenG) connected to a case > where true do the calling by ref. Everything is in a > while loop). The true case execute twice (one when > you start holding the slider and one when you > release it). In between, the execution is "halted" > on the Open VI ref (the first time the case become > true). It seem that my problem is that in my app I > do not catch the second execution (which contain the > last "valid" value for the slide). I will need to > investigate further why it is so (it might be > because by the time the second firing occurs, I am > still doing other stuff and I am missing it). > As a side note, I am not using event structure in > this app. > > In any case, thanks for the reply. > > PJM > > Irene He <[EMAIL PROTECTED]> wrote: > Could that be that when you press down the slider > there is an event occurred that cause you to > execute > other states in the state machine, so that it > never > gets to the "call by ref" case in your state > machine > until you release the mouse? > Just guessing... > Irene > > > ----- Original Message ----- > > From: PJ M > > To: LABVIEW INFO > > Sent: Monday, January 26, 2004 12:15 PM > > Subject: [A] Call by Ref & Open VI Ref Question > > > > > > Hi everyone, > > > > I have a main VI that call a SubVI containing a > call > > by reference. > > The call by ref pass some parameters to the > target > > VI. > > One of the parameter is from a control on the > main > > VI (UI). As long as I dont hold the control (a > > slider), everything is fine. If I do hold the > > control, the call by reference does not execute > > until I release the mouse (to be more specific > the > > Open VI reference does not execute). It would > not be > > a problem if the call by reference was not in a > > state machine, (and expected to be called > several > > time while the user hold the control), the > > consequence is that my VI execute only once with > the > > first value from the control which is always > never > > the one when the user release the mouse. It > might > > very well be a know behavior (but until now it > has > > never been an issue for me). Does it happen > because > > my SubVI is in the UI thread (because of the > call by > > ref ? )? Is there a way to prevent this from > > happenning (or do I have to redesign my VI > around > > that behavior ?)? > > > > Thanks > > > > PJM > > > > > > > > -------------------------------------------------------------------------------- > > Do you Yahoo!? > > Yahoo! SiteBuilder - Free web site building > tool. > > Try it! > > > ===== > Irene He > [EMAIL PROTECTED] > www.hytekautomation.com > www.geocities.com/irene_he > > > > -------------------------------------------------------------------------------- > Do you Yahoo!? > Yahoo! SiteBuilder - Free web site building tool. > Try it!
===== Irene He [EMAIL PROTECTED] www.hytekautomation.com www.geocities.com/irene_he
