File dialog box slow down execution

Dear all,
I am using Labview 8.2.1 with Windows XP.
I have a program who's allow the user to select any file or folder thanks to File dialog box.
For a reason that i don't understand when this dialog box is displayed, other parrallel while loop time execution goes slow down.
Put on my LabView front panel File Path command without any code and press "Browse" file button as shown on joined picture_1 birng slow down execution of the while loop.
Does any body could explain why this problem appear ?
By switch off on LabView Tool parameter "Use native file dialogs" (picture_2). the problem disapear. Unfortunately this kind of old dialog box is not practical...
If any body have an idea it could help me.
Thanks.
Solved!
Go to Solution.
Attachments:
picture_1.JPG ‏16 KB
picture_2.JPG ‏71 KB

__KB__ wrote:
Hello,
When the File dialog box is running, other while loop time execution goes down.
Thanks.
This you have already mentioned in your first post... now my question is how you've actually figured it out... or can you share your code here???
I am not allergic to Kudos, in fact I love Kudos.
Make your LabVIEW experience more CONVENIENT.

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__KB__ wrote:
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__KB__ wrote:
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The Labview File Dialog Box Express VI sometimes takes 5 to 10 seconds to execute. On other occasions, it executes in a blink of an eye. Why is that so?
I have tried to use the older Open/Create/Replace File VI as suggested in one of the forum's posts...but it behaves exactly the same way. Another problem is the trimming of the filename, which has also been reported and has NOT YET been solved.
(By the way...Recently, I updated to LV 2012 SP2 by suggestion of the NI Update Manager, only to find out that I was not entitled to this SP (which apparently only includes bug fixes) and I will have to roll back to LV 2012. Still, in the evaluation version I can see that the bug is not fixed. Labview must have a lot of serious bugs for NI to ask for a paid bug fix, in which some bugs remain after having been reported a long time ago..well...)
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First of all: Thank you very much for the objective answer. I suppose that yor actually ARE a NI engineer, as I had hoped for.
lease find my comments above (helder---------------------)
helder wrote:
The Labview File Dialog Box Express VI sometimes takes 5 to 10 seconds to execute. On other occasions, it executes in a blink of an eye. Why is that so?
What worries me now is that intermittent lag in the execution of the File Dialog (such a basic basic function of a program...). Anyone have any idea about this?
The file dialog is provided by the OS, so if it is slow it is not LabVIEW's fault.
What kind of computer do you have? Is this a laptop that spins down the HD to save power? In this case it needs to wait for the HD to spin up. (You can change the windows power profile or you can spend more money and get an SSD).
Are you very low on memory?
Does your LabVIEW program waste 100% CPU in parallel doing nothing due to bad coding?
Are you pointing to a location that has millions of files?
Are you pointing to a network location?
helder:---------------------------------------
I understand that the File Dialog is provided by the OS. But I have other applications on my PC and this doesn't happen - just in Labview. Sorry! And sometimes it
doesn't happen. Every 10 times I open the File dialog Box, 5 times it takes long and 5 times it is immediate.
(I am not low on memory, my coding is not bad>-look at the VI I sent, it just contains the fragment which uses the File Dialog Box and it behaves the same way! I am pointing to the same location that the other applications point to, I am not pointing to a network location, the PC is not spinning the disk down, etc etc.)
But yes, I will try it on another PC
(There was another post on the forum on this issue, but can't seem to find it now, just find my own post )
I attach a video demo of what happens.
helder wrote:
Another problem is the trimming of the filename, which has also been reported and has NOT YET been solved.
What problem is that? Can you elaborate? There is a known bug in the windows dialog box that sometimes the pre-filled file names are shifted and not fully visible. This is a windows bug documented by Microsoft and LabVIEW has no control over it. It is not NIs job to fix OS problems.
helder:-------------------------------------------
Of course you can't fix the OS.
If it is a windows bug, we will have to live with it.
A previous post on your forum did not provide me with that information (http://forums.ni.com/t5/LabVIEW/File-dialog-trimming-the-default-name/td-p/2189874). The fact that it is a windows bug was not mentioned there.
helder wrote:
Hi all
(By the way...Recently, I updated to LV 2012 SP2 by suggestion of the NI Update Manager, only to find out that I was not entitled to this SP (which apparently only includes bug fixes) and I will have to roll back to LV 2012. Still, in the evaluation version I can see that the bug is not fixed.
Patches are included, service packs are not included. I think this is well documented. Most users are on SSP, this way you are always entitled to the newest version.
As with anything else, software has bugs. It is impossible to test a huge, complex system like LabVIEW under all scenarios. The possible number of combinations of hardware and other installed software on any particular computer probably exceeds the number of atoms in the universe. It is actually amazing how few bugs there are and how well it works. What "bug" are you talking about? Bugs are prioritized according to rules. Critical bugs are typically fixed very quickly. A cosmetic issue that only affects you and nobody else will take longer or might not even get fixed. Are you talking about a confirmed bug that could be reproduced by NI? Do you have a CAR#?
helder:----------------------------------------
I was referring to the file-name-shifting-cosmetic-bug that the October-2012 post had indicated. But if it is a Windows-bug, NI does not have any responsibility, of
course.
Regarding the bugs, of course they are unavoidable.
helder wrote:
Labview must have a lot of serious bugs for NI to ask for a paid bug fix, in which some bugs remain after having been reported a long time ago..well...)
That sentence makes no sense! Why would the number of serious bugs depend on the cost of upgrading?? You are just rambling here....
In an ideal world, NI would have an unlimited number of programmers that can work 24/7 to immediately fix any discovered bug. This would only be possible if all users are willing to pay an unlimited amount of money for the software. As I mentioned, bug fixes are free in the form of patches, and they come out regularly. Service packs include new features and are not free.
helder:---------------------------------------
"....include new features"..????
---->>From http://www.ni.com/labview/release-details/
"LabVIEW 2012 Service Pack 1 is an exclusive update to LabVIEW 2012 for NI Standard Service Program (SSP) customers. There are no new product features introduced in service pack releases; instead, these releases provide bug fixes and improved stability for LabVIEW 2012. For a list of these bug fixes, click here."
No new features, just bug fixes!"
Moreover: If it isn't free, it shouldn' have let me update if I am not a SSP costumer.
Now I have a 45 days evaluation version. After that, I have to uninstall and reinstall everything.That takes some time and effort.
If there is a more direct way of rolling back t the previous version, please let me know.
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