Executable Code Speed Vs. Development Environment Code Speed under windows 7

Hi,
I implemented a "closed loop" type controller in Labview 2012 running on windows 7 to control a motor speed. In my code, I have a main loop that first measures data using a PCI daq card, and then processes the data, and then output data to another PCI daq card. The main loop is set to run at 100Hz. So, 100 times a second I read data, then process the data, then output new data. I am using the Input daq card timing to sync the main loop to 100Hz. When I run this code in the Labview development environment, it seems to run just fine and is able to keep up with the 100hz loop time with no apparent lag. but when I create an executable and run it (on the same machine), it initially appears to run at 100Hz but soon after that it starts to slow down to about 10hz or less. This is causing issues with my motor control. I set the priority of the application under windows task manager to real time (which is the highest option available) to force Windows to let it run as fast as possible but it didn't seem to help much. I compared using a while loop and a timed while loop and found that the while loop ran faster when creating the executable. Any thoughts on what to do to make the executable run faster and why does this happen?
Thanks

Can you post the code?
A wild guess is that there's some array growing wildly causing memory issues, and if you let the program run for a while longer it'll crash with out of memory error.
Is the program only supposed to feed data from one card to the other?
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

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Message Edited by jmcbee on 04-28-2009 10:00 AM
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Using LV 2013, 2012
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Attachments:
Reuse.PNG ‏14 KB

Hi jmcbee,
In spite of years of using LV and building a resuable library of code, I've done very little with customizing the standard paletts, however,
Many times when deploying a new distributable I've seen a dialog like what you posted. In most cases the problem was solved by rebuilding distributable to include the missing VIs. In one case I added the VI-lib to the target-platform and made-sure VI-lib was in distributable's VI search-path.
There are two ways I know of to build distributables which include the VI-lib code,
1) Include all VI-lib VIs when building the distributable
- In LV 8x, uncheck "Exclude Files from VI lib" project-property.
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- This can add an enormous number of un-needed VIs (see this post.)
2) Re-write the VIs so that they are no-longer identified with VI-lib and get included "naturally".
- Open each VI diagram, select-all, paste in new/untitled diagram. In your case naming will be tricky, but it's doable.
- This is a great advantage in 8x as it allows LLBs to be built with File\Save As\Create Hierarchy.
In addition, here's a tool to call following "Open VI Reference" (if it returns an error.) This VI open all broken children making it much easier to identify specific missing parts (typically VI-lib.)
Luck/
Cheers!
"Inside every large program is a small program struggling to get out." (attributed to Tony Hoare)
Attachments:
Util.VI.OpenBroken.vi ‏57 KB

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Executable Code Speed Vs. Development Environment Code Speed under windows 7