Programs hangs, unless highlighting execution or disabling multithreading

I'm making a program to control my signal generator over a GPIB board. Have all the drivers belonging to the SG, so it's just a simple loop where I can set the parameters. VERY basic, I thought....
The program almost immediately hangs... However, when I use 'highlight execution', or 'single step' through it, it runs fine. No problems at all. So that makes it a bit difficult to debug... :-)
Been testing a lot allready and found out that disabling multithreading also solves the problem.
Does that sound familiar? Any way to solve the problem?
I guess it's a timing problem of some sort, but I'm not sure that I can change much. I'm almost only calling the SG driver VI's. Looked into those VI's, and they're all just DLL calls. Nothing I can do there...
Ofcourse I could just disable multithreading as a work-around. But how bad will I suffer in performance/responsiveness if I disable multithreading? It's only a tiny program now, but it's supposed to grow quite big.
Any thoughts?

albert geven wrote:
Your problem can be genrated by too fast messaging to the SG
Also polling on a statusbyte should not be too fast, but ms waits should not be neceesary except when polling in a while loop.
Not sure that I understand.. Do you mean that the VI´s that control the SG allready return before the actual instruction is carried out by the instrument? So that I´m issuing new commands while it is not ready with the first ones?
Using sequences to determine execution order is the second best.
Error In, Error out offer better control and more readability.
I know, I know.... But the standard Labview 'wait' VI doesn´t have error I/O. So when I quickly needed to put a wait in a specific spot, I added a sequence around the wait, and run the error line through it. Just now that I had to put in so many, it was becoming a mess. Allready made a custom 'wait' VI with error lines now. (See the code)
Greetings from Germany.
Attachments:
test Marconi 2030 - v2.vi ‏76 KB

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    Jhon Kao
    Message was edited to better format the Java code:
    gmfeinberg
    added some more info to describe the problem:
    Excalibur
    null

    Dear gmfeinberg,
    You are so kind. I appreciate very much for your approval. You are alway very warm-hearted to help others. Thanks very much.
    I followed your advice and changed the prepare() to add the transaction as a parameter. The complete code I have already posted above. But unfortunately the program hangs also. The complete output of the db_stat -CA when the hang happens is below:
    Default locking region information:
    395     Last allocated locker ID
    0x7fffffff     Current maximum unused locker ID
    9     Number of lock modes
    1000     Maximum number of locks possible
    1000     Maximum number of lockers possible
    1000     Maximum number of lock objects possible
    132     Number of current locks
    134     Maximum number of locks at any one time
    544     Number of current lockers
    582     Maximum number of lockers at any one time
    12     Number of current lock objects
    19     Maximum number of lock objects at any one time
    3935     Total number of locks requested
    3697     Total number of locks released
    0     Total number of locks upgraded
    58     Total number of locks downgraded
    257     Lock requests not available due to conflicts, for which we waited
    101     Lock requests not available due to conflicts, for which we did not wait
    0     Number of deadlocks
    0     Lock timeout value
    0     Number of locks that have timed out
    0     Transaction timeout value
    0     Number of transactions that have timed out
    472KB     The size of the lock region
    938     The number of region locks that required waiting (3%)
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    Lock REGINFO information:
    Lock     Region type
    5     Region ID
    __db.005     Region name
    0x720000     Original region address
    0x720000     Region address
    0x720048     Region primary address
    0     Region maximum allocation
    0     Region allocated
    Region allocations: 3005 allocations, 0 failures, 0 frees, 1 longest
    REGION_JOIN_OK     Region flags
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    Lock region parameters:
    65571     Lock region region mutex [938/28484 3% 4244/7164]
    1031     locker table size
    1031     object table size
    448     obj_off
    45880     locker_off
    0     need_dd
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    Lock conflict matrix:
    0     0     0     0     0     0     0     0     0     
    0     0     1     0     1     0     1     0     1     
    0     1     1     1     1     1     1     1     1     
    0     0     0     0     0     0     0     0     0     
    0     1     1     0     0     0     0     1     1     
    0     0     1     0     0     0     0     0     1     
    0     1     1     0     0     0     0     1     1     
    0     0     1     0     1     0     1     0     0     
    0     1     1     0     1     1     1     0     1     
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    Locks grouped by lockers:
    Locker   Mode      Count Status  ----------------- Object ---------------
           2 dd=464 locks held 2    write locks 0    pid/thread 1704/5836  
           2 READ          1 HELD    entry.dbxml               handle        2
           2 READ          1 HELD    entry.dbxml               handle        0
           5 dd=463 locks held 0    write locks 0    pid/thread 1704/5836  
           6 dd=462 locks held 1    write locks 0    pid/thread 1704/5836  
           6 READ          1 HELD    entry.dbxml               handle        4
           9 dd=461 locks held 0    write locks 0    pid/thread 1704/5836  
           a dd=460 locks held 1    write locks 0    pid/thread 1704/5836  
           a READ          1 HELD    entry.dbxml               handle        6
           d dd=459 locks held 0    write locks 0    pid/thread 1704/5836  
           e dd=458 locks held 1    write locks 0    pid/thread 1704/5836  
           e READ          1 HELD    entry.dbxml               handle        8
          11 dd=457 locks held 0    write locks 0    pid/thread 1704/5836  
          12 dd=456 locks held 1    write locks 0    pid/thread 1704/5836  
          12 READ          1 HELD    entry.dbxml               handle       10
          15 dd=455 locks held 0    write locks 0    pid/thread 1704/5836  
          16 dd=454 locks held 2    write locks 0    pid/thread 1704/5836  
          16 READ          1 HELD    entry.dbxml               handle       12
          16 READ          5 HELD    entry.dbxml               handle        0
          19 dd=453 locks held 0    write locks 0    pid/thread 1704/7764  
          1d dd=452 locks held 1    write locks 0    pid/thread 1704/5836  
          1d READ          1 HELD    entry.dbxml               handle       14
          20 dd=451 locks held 0    write locks 0    pid/thread 1704/6460  
          21 dd=450 locks held 2    write locks 0    pid/thread 1704/5836  
          21 READ          1 HELD    entry.dbxml               handle       16
          21 READ          2 HELD    entry.dbxml               handle        0
          24 dd=449 locks held 0    write locks 0    pid/thread 1704/5836  
          52 dd=448 locks held 2    write locks 0    pid/thread 1704/5836  
          52 READ          1 HELD    entry.dbxml               handle       18
          52 READ          1 HELD    entry.dbxml               handle        0
          55 dd=447 locks held 0    write locks 0    pid/thread 1704/5836  
          56 dd=446 locks held 1    write locks 0    pid/thread 1704/1168  
          56 READ          1 HELD    entry.dbxml               page         13
          57 dd=335 locks held 0    write locks 0    pid/thread 1704/4692  
          58 dd=334 locks held 0    write locks 0    pid/thread 1704/4692  
          59 dd=333 locks held 0    write locks 0    pid/thread 1704/4692  
          5a dd=332 locks held 0    write locks 0    pid/thread 1704/4692  
          5b dd=331 locks held 0    write locks 0    pid/thread 1704/4692  
          5c dd=330 locks held 0    write locks 0    pid/thread 1704/4692  
          5d dd=327 locks held 0    write locks 0    pid/thread 1704/7184  
          5e dd=324 locks held 0    write locks 0    pid/thread 1704/1168  
          5f dd=320 locks held 0    write locks 0    pid/thread 1704/6876  
          60 dd=319 locks held 0    write locks 0    pid/thread 1704/6380  
          61 dd=318 locks held 0    write locks 0    pid/thread 1704/6752  
          62 dd=317 locks held 0    write locks 0    pid/thread 1704/7348  
          63 dd=316 locks held 0    write locks 0    pid/thread 1704/1844  
          64 dd=315 locks held 0    write locks 0    pid/thread 1704/5224  
          65 dd=314 locks held 0    write locks 0    pid/thread 1704/5668  
          66 dd=313 locks held 0    write locks 0    pid/thread 1704/8164  
          67 dd=312 locks held 0    write locks 0    pid/thread 1704/6272  
          68 dd=310 locks held 0    write locks 0    pid/thread 1704/6268  
          69 dd=309 locks held 0    write locks 0    pid/thread 1704/7148  
          6a dd=308 locks held 0    write locks 0    pid/thread 1704/7184  
          6b dd=307 locks held 0    write locks 0    pid/thread 1704/6596  
          6c dd=306 locks held 0    write locks 0    pid/thread 1704/6044  
          6d dd=302 locks held 0    write locks 0    pid/thread 1704/6476  
          6e dd=301 locks held 0    write locks 0    pid/thread 1704/6916  
          6f dd=300 locks held 0    write locks 0    pid/thread 1704/4784  
          70 dd=299 locks held 0    write locks 0    pid/thread 1704/7444  
          71 dd=298 locks held 0    write locks 0    pid/thread 1704/5544  
          72 dd=297 locks held 0    write locks 0    pid/thread 1704/7140  
          73 dd=296 locks held 0    write locks 0    pid/thread 1704/5724  
          74 dd=295 locks held 0    write locks 0    pid/thread 1704/956  
          75 dd=294 locks held 0    write locks 0    pid/thread 1704/7916  
          76 dd=293 locks held 0    write locks 0    pid/thread 1704/6116  
          77 dd=292 locks held 0    write locks 0    pid/thread 1704/7928  
          78 dd=291 locks held 0    write locks 0    pid/thread 1704/6116  
          79 dd=290 locks held 0    write locks 0    pid/thread 1704/7160  
          7a dd=289 locks held 0    write locks 0    pid/thread 1704/6656  
          7b dd=288 locks held 0    write locks 0    pid/thread 1704/7212  
          7c dd=287 locks held 0    write locks 0    pid/thread 1704/6116  
          7d dd=286 locks held 0    write locks 0    pid/thread 1704/5820  
          7e dd=285 locks held 0    write locks 0    pid/thread 1704/5088  
          7f dd=284 locks held 0    write locks 0    pid/thread 1704/1108  
          80 dd=283 locks held 0    write locks 0    pid/thread 1704/7372  
          81 dd=282 locks held 0    write locks 0    pid/thread 1704/4692  
          82 dd=281 locks held 0    write locks 0    pid/thread 1704/7460  
          83 dd=280 locks held 0    write locks 0    pid/thread 1704/5528  
          84 dd=279 locks held 0    write locks 0    pid/thread 1704/7160  
          85 dd=278 locks held 0    write locks 0    pid/thread 1704/1168  
          86 dd=275 locks held 0    write locks 0    pid/thread 1704/5464  
          87 dd=274 locks held 0    write locks 0    pid/thread 1704/5652  
          88 dd=273 locks held 0    write locks 0    pid/thread 1704/6628  
          89 dd=272 locks held 0    write locks 0    pid/thread 1704/5164  
          8a dd=271 locks held 0    write locks 0    pid/thread 1704/7372  
          8b dd=270 locks held 0    write locks 0    pid/thread 1704/5236  
          8c dd=269 locks held 0    write locks 0    pid/thread 1704/6532  
          8d dd=268 locks held 0    write locks 0    pid/thread 1704/4656  
          8e dd=267 locks held 0    write locks 0    pid/thread 1704/7708  
          8f dd=266 locks held 0    write locks 0    pid/thread 1704/5112  
          90 dd=265 locks held 0    write locks 0    pid/thread 1704/7484  
          91 dd=259 locks held 0    write locks 0    pid/thread 1704/7352  
          92 dd=258 locks held 0    write locks 0    pid/thread 1704/7408  
          93 dd=257 locks held 0    write locks 0    pid/thread 1704/5472  
          94 dd=256 locks held 0    write locks 0    pid/thread 1704/7372  
          95 dd=255 locks held 0    write locks 0    pid/thread 1704/7552  
          96 dd=252 locks held 0    write locks 0    pid/thread 1704/5112  
          97 dd=249 locks held 0    write locks 0    pid/thread 1704/5472  
          98 dd=248 locks held 0    write locks 0    pid/thread 1704/5472  
          99 dd=247 locks held 0    write locks 0    pid/thread 1704/6460  
          9a dd=246 locks held 0    write locks 0    pid/thread 1704/5432  
          9b dd=245 locks held 0    write locks 0    pid/thread 1704/7220  
          9c dd=244 locks held 0    write locks 0    pid/thread 1704/7768  
          9d dd=243 locks held 0    write locks 0    pid/thread 1704/5088  
          9e dd=242 locks held 0    write locks 0    pid/thread 1704/5544  
          9f dd=241 locks held 0    write locks 0    pid/thread 1704/5272  
          a0 dd=240 locks held 0    write locks 0    pid/thread 1704/7284  
          a1 dd=239 locks held 0    write locks 0    pid/thread 1704/3884  
          a2 dd=238 locks held 0    write locks 0    pid/thread 1704/4552  
          a3 dd=237 locks held 0    write locks 0    pid/thread 1704/6460  
          a4 dd=236 locks held 0    write locks 0    pid/thread 1704/6324  
          a5 dd=235 locks held 0    write locks 0    pid/thread 1704/6272  
          a6 dd=234 locks held 0    write locks 0    pid/thread 1704/7276  
          a7 dd=233 locks held 0    write locks 0    pid/thread 1704/4552  
          a8 dd=232 locks held 0    write locks 0    pid/thread 1704/6876  
          a9 dd=231 locks held 0    write locks 0    pid/thread 1704/5296  
          aa dd=230 locks held 0    write locks 0    pid/thread 1704/5668  
          ab dd=229 locks held 0    write locks 0    pid/thread 1704/8164  
          ac dd=228 locks held 0    write locks 0    pid/thread 1704/5444  
          ad dd=227 locks held 0    write locks 0    pid/thread 1704/7916  
          ae dd=226 locks held 0    write locks 0    pid/thread 1704/1944  
          af dd=225 locks held 0    write locks 0    pid/thread 1704/7040  
          b0 dd=224 locks held 0    write locks 0    pid/thread 1704/5548  
          b1 dd=223 locks held 0    write locks 0    pid/thread 1704/3880  
          b2 dd=222 locks held 0    write locks 0    pid/thread 1704/5428  
          b3 dd=221 locks held 0    write locks 0    pid/thread 1704/5224  
          b4 dd=220 locks held 0    write locks 0    pid/thread 1704/6420  
          b5 dd=219 locks held 0    write locks 0    pid/thread 1704/7104  
          b6 dd=218 locks held 0    write locks 0    pid/thread 1704/5944  
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         122 READ          1 HELD    entry.dbxml               page         13
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  • Highlight execution in parallel loops

    I am programming an FPGA in Labview, and am trying to debug my code. After switching my execution target to the FPGA's emulator, I activate the "highligh execution button" and press the "step into" button, but the only loop that is stepped into is the first. How can I select which loop's execution do I want to highligh? Thank you.

    Could you give more details about what is happening?
    I have checked a FPGA example included in LabVIEW called UpDpwn Ctr, Synchronized.vi. This VI has two parallel while loops and when I activate the highlight execution and press step into button several times, the burbles appear in both while loops and the dataflow alternates between both loops.
    crisR

  • HT3964 programs hanging; long wait time

    programs hanging; long wait time for 'pie' to clear; reset the smc and still not functioning.  pls. help.

    Hello, see how many of these you can answer...
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    http://support.apple.com/kb/PH7029
    Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?
    How much RAM & free space do you have also, click on the Memory & Disk Usage Tabs.
    Open Console in Utilities & see if there are any clues or repeating messages when this happens.
    In the Memory tab of Activity Monitor, are there a lot of Pageouts?
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    One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
    PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
    Reboot, test again.
    If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on,IPmyriadLogin Items window to see if it or something relevant is listed.
    Check the System Preferences>Other Row, for 3rd party Pref Panes.
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    /private/var/run/StartupItems
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  • How to find which sub-vi is running in highlight execution mode?

    Hi there,
    It sometimes happens that while debugging you program you open a lot of sub-vis put probes in many places turn on highlight execution in dirrerent sub-vis and then forget to turn it off.
    You close all sub-vis and run software and it runs SLOOOOW. Then you need to go and find that sub-vi that runs in highlight execution mode.
    I was just wondering if there is an easy/automatic way find which vi has highlight execution mode turned on?
    Solved!
    Go to Solution.

    Here is a small utility to switch off Execution Highlight mode off all opened subvis. Drop it into the Project subfolder in the LabVIEW application folder, then restart LabVIEW. A new item "Stop Highlight mode..." will appear in the Tools menu. Enjoy !
    Chilly Charly    (aka CC)
             E-List Master - Kudos glutton - Press the yellow button on the left...        
    Attachments:
    Stop Highlight Execution.vi ‏16 KB

  • Lost Highlight Execution button and more from tool bar

    So this is probably a dumb...but I've somehow "lost" the highlight execution, pause, probe and stepping buttons from my block diagram window toolbar.  I'm Struggling a little bit trying to figure out how to bring them back, probably something dumb but not knowing where to look I need help.  The "View Toolbars" option under the View menu is disabled, if that means anything.
    Thanks.

    Hey, It seems somebody won me this race , I'll be faster next time
    Regards.
    Robst
    Robst - CLD
    Using LabVIEW since version 7.0

  • Show highlight execution button

    Hi there,
    I wish to ask a basic question about highlight execution and retain wire values. I know that the buttons should normally be placed on the toolbar, however, in the case they are not there, where can I click to make them reappear? thanks!
    Best
    Harry
    Solved!
    Go to Solution.

    You probably have debugging disabled. Go into the VI properties under execution and see if Allow Debugging is checked.
    =====================
    LabVIEW 2012

  • Highlight execution problem

    Hello
    I have created a small vi for taking measurements form DMM.
    My goal is to stop it when buffer reaches to 100.i.e. Buffer is full.
    I am giving command F1G0B1Q11X to read my data.
    but buffer is never reaching 100. Buffer count sometime increases sometime decreases and program runs continuously.
    It is working fine in Highlight execution mode in labview, when at runtime labview shows us where the program is executing at any instance. Buffer is increasing and program also stops when it reaches 100.
    I am attaching my vi kindly take a view on it and let me know What wrong I am doing.
    Please help me.
    Attachments:
    BufferCount.vi ‏16 KB

    Well, you are constantly reading it, which takes items out of the buffer.  So that just means that you are keeping up with the acquisition.  I most situations, that is a good thing.  If you just want the 100 items, then don't read them.  Just check for the buffer reading 100 and then use a FOR loop to read the 100 samples.  Or you could just use a FOR loop to read the 100 samples in the first place.
    There are only two ways to tell somebody thanks: Kudos and Marked Solutions
    Unofficial Forum Rules and Guidelines

  • Initialize differentl​y with highlight execution

    Hi everybody,
    I found that I got different results when highlighting execution or not, quite strange.
    As the VI attached below, I try to use the "index" got from the last time to adjust the starting point of the sine signal inside the loops, but I need to initialize it to 0 when finishing the for loop and running the program once again, so I put an initialize invoke node outside of the for loop.
    However, say, now I change the value of the "index" indicator to 20 and run the program, the local variable isn't initialized to 0, and the signal doesn't begin from 20.17v. While when I turn on the highlight execution, It indeed displays initialize to 0 and the signal begins from 20.17v properly...
    I feel quite confused why the VI runs differently when I turn on the highlight execution or not. Is it related to the time delay or something? Need your help!
    Thanks a lot! : )
    Attachments:
    VI.zip ‏105 KB

    Your problem is related to the dataflow. There is nothing in your vi to insure that the initialisation will be done before you enter the for loop. The prefered way is to use the error wire to connect the error in/error out input/output of the various subVIs/property nodes ...
    Ben64

  • Highlight execution speed up

    Hi Visual Programming Champions!
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    Thanks for your answer.  If I get a
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    Alex Tressapos
    Solved!
    Go to Solution.

    Thanks
    That was really helpful, now I only need 1000 dlls to buy
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    Alex Tressapos
    Labview proven noob

  • Highlight Execution deviation

    Good day: I am using AO Waveform gen.vi to produce a 40Hz wave, and the vi successfully produces the wave during the highlight execution mode.  When not in the highlight execution mode, however, the output signal is not the desired sine wave, but rather sporadicly decaying traces with variable amplitudes.
    Any help is greatly appreciated, Thanks!

    ok, we've come to the idea that the problem involves the ao wait.vi.  we used the ao config, write, start, wait, and clear in place of the ao waveform gen and find that when ao wait is inside of the while loop that ao config, write,and start are in there is an infinite loop which prevents the rest of the program from running while the buffered waveform runs to completion.  when we move the ao wait to outside of the while loop, the waveform isn't seen at all, but the rest of the functions on the front panel not included within the while loop do run.  additionally, changing the buffer size does impact the length of time that the program is stuck within the infinite loop.
    if this is a problem with the ao wait i'm not sure how to arrange the vi's to acheive a constantly running waveform without causing an infinite loop.
    thanks for any help you may lend

  • When I plug my headphones into the headphone/optical out jack programs hang

    I have an iMac 20 inch LCD. On the back their is a jack with a picture of headphones, but it is also labeled as "optical out". I plug my headphones in and they work. Great. That is not my problem today.
    My problem is that whenever I plug the headphones in or unplug them, iTunes (and other apps using audio) hangs and when I try to adjust the volume with the keyboard buttons nothing happens for 15 seconds or more and then the volume changes, not that anything is able to play. If I wait for a minute or so then all my applications start working fine again and I am able to hear my music and adjust the volume.
    What in the world is going on?
    1.8 Ghz G5 1.25GB RAM   Mac OS X (10.3.9)  

    Thank you. That is good information.
    Does this mean that there is nothing I can do about the delay? When I think of a delay, I think of maybe 10 seconds. I am having to wait for a minute or more for my audio to switch. While I wait, I have no audio and any audio program hangs. Is there a setting I can change? It seems rather ridiculous that I have to wait so long just to switch from internal speakers to headphones.
    It is like this on other Mac machines? Or it is just my iMac? I hate to compare Mac to Windows, but on Windows or Linux computers the switch is instantaneous.

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