Labview - HP E3631A PowerSupply Problems

I try to to connect to HP E3631A via LabView on a WinXP PC. I have tryed both "Multi-Environment Certified IVI Instrument Driver" and "LabVIEW Certified Plug and Play Instrument Driver". I get the error message 511 on the instrument. In the manual it says "RS-232 framing error" but I have the same settings on the PC as on the instrument...

Hi,
A framing error is usually caused, as you probably know, by a mismatch in the serial port settings between the ports.
I checked the LabVIEW PnP driver. This driver is written for GPIB. Although the VISA reads and write might work, the driver doesn't explicitly configure the serial port.
On the IVI driver the VISA serial attribute configured are the termination character '\n' and enable VISA to detect the termination character. There is no additional serial port settings.
Try using Hyperterminal to see if the framming error occurs. Although the viOpen function in the IVI uses the access mode to 0, check the serial port setting in MAX, and make sure they match. Refer to Default Settings for Serial Ports for more details.
DiegoF
National Instruments.

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Teststand generates error ' labview has encountered a problem and needs to close'

Hi,
I am using Teststand 3.1 and Labview 7.1.
My problem is that I have a 1D array of 6 elements in Labview that I need to receive from Teststand.
If the array size is set to variable in Labview there is no problem but if I set it to what I require ( fixed 6 ) then when I specify module in Teststand an error message appears , ' LAbview.exe has encountered a problem and needs to close '. Then I get an 18001 about ActiveX as labview has closed.
Why does this happen ?, is it a bug ?

No bother its attached !
The vi writes to a global variable.
The 'Bytes To Send ' 1D array seems to be the trouble, If its set to fixed 6 in LV then Labview crashes from Teststand when I specify module.
If its set to variable its ok.
Attachments:
Global_Write.vi ‏26 KB

Labview slider event handling problems - revisited

This topic asked a question that was very close to a problem I am having:
Labview slider event handling problems
That is, how do I, using an event structure and/or other means, only read out the value of a slider control after the value change is finalized?
The extra constraint I'd like to place on this, which I believe will invalidate the answer given in the thread above, is that my slider control also has a digital display which can also be used to change the value without ever using the mouse. I cannot look for a value change followed by a mouse-up event if the mouse was not used to change the value.
Any ideas how this might be accomplished? FWIW, I am using LabVIEW 7.0

Each and every incremental value-change event generated by the movement of the slider is still detected and queued up for use by the event structure and the event structure loop wades through them all before it's done.
I have come up the attached "fix" (LV v7.0) for this problem. While it is not as clean a solution as I had hoped it would be, it's the best I can manage given what LabVIEW offers me to work with and it does work in the situation where I need to use it.
Now, within the Finalize Slider Events subVI, I'm keeping track of the most-recent values seen by the subVI, checking to see if they have changed, and reporting out that fact. That gives me a Changed/Not-Changed bit within the event case that I can use to control what code then gets executed. If the event case is just playing catch-up to the real value of the control, I can now see that fact and ignore it.
In this version I've also dumped the variant output and limited the VI to using DBL values. I decided it added complication to something that was too complicated already and I wanted the output terminals for other purposes anyway (reporting of the correct "OldVal" of the control).Message Edited by Warren Massey on 04-28-2005 03:56 AM
Attachments:
slider_events[5].llb ‏77 KB

Labview 7.0 express problem with windows xp professional

we get the usable error window in windows xp professional with some error & asking to send error report or don't send when using labview 7.0 express, whatever option we select the application shutdown.
please advice its urgent. i am attaching the error log file. is this the application issue or the OS problem....?
Attachments:
appcompat.txt ‏35 KB

Xp seems to always ask the user about sending an error report with any application that crashes. THis is an operating system "bonus feature". Let focus on what steps you are doing to reproduce this error. Can you post the vi that is creating the error?
BJD1613
Lead Test Tools Development Engineer
Philips Respironics
Certified LV Architect / Instructor

Labview file load memory problem

Hi Guys,
I am loading a binay different binary files and am having error of "Memory full"
When I load a 43,837 and 110,196kb file this error comes .
and when I load 5,811 kb file it works fine.
Please note that 43,837kb file has 5611000 samples and 110,196kb file has 8060000
can anyone tell me the solution to fix it ?
Rgs
M Omar Tariq

Please post your code so we can give you real suggestions. It sounds like you are make extra memory copies you probably don't need. To get a jump start on the problem, take a look at the tutorial Managing Large Data Sets in LabVIEW. Newer versions of LabVIEW have this information in the help files.
This account is no longer active. Contact ShadesOfGray for current posts and information.

Read access mdb file in labview via ADO/DAO problem

Hi guys,
I am now facing one problem that I want to import ACCESS database (ver2000) files into labview and turn it into tables.
but if I use ADO(actually using LABSQL) I have to create the ODBC in control panel, if I use DAO, I don't know how to call the activeX method.
I would like to realize like this:
choose in a directory which mdb file I would like to open, and then open it and show it in a labview table, but using AD0 I have to create connection for each file, does it stand a chance to open it without specify the connection in control panel?
He Liang

You can use a Connection String defined by you like this
You can get the basic connection string by creating a UDL file and editing that file in Wordpad.
Hope this helps
David
Message Edited by David Crawford on 11-27-2006 01:04 PM
Attachments:
Connection String.jpg ‏13 KB

Labview has encountered a problem and close by windows

Dear All,
Here I have one question to ask for you. it is that labview was closed automatically by windows and return a information After I run a program(This program was written in labview, it called a .dll to completed a certain process.). Please see the attached for the returned information.
who can tell me why?Thanks a lot!
Best regards,
jimmy
Attachments:
returned information.doc ‏26 KB

smercurio_fc wrote:
It's quite possible the DLL is getting garbage values from the implicit coercion and it's not smart enough to check the values for "good values" before operating with them, and that's what's causing the crash. I've seen instances where this happens, hence my recommendation to change the datatype to U8.
Can you reproduce this? This definitely shouldn't be happening. A LabVIEW coercion should happen purely inside LV and not affect the DLL in any way.
Of course, an alternative test is to call the DLL from a C program in exactly the same way as is done in the LabVIEW code and see what happens.
That is an option, although it will not necessarily help because the problem doesn't occur when calling the DLL, but only when closing the VI. Due to this, another suggestion would be to call the VI as a subVI. It was obviously designed to be called as such and that might cause the problem to stop happening. This is obviously not a real solution, because if there is memory corruption, it's best to find it near the source than at some later time, but it might work.
Try to take over the world!

Labview runtime engine plugin problem in Mac OS X

Hi:
We have just recently acquired a macBook Pro and am trying to test some instrumentation modules we have previously developed online for Circuit Theory courses on the MAc platform.
These VI's are installed on lab view server and we have no difficulty accessing them in Windows XP or Vista from a browser either Firefox or IE. Of course the latest version of runtime engine is installed on the pc prior to accessing the vi using remote panel and secondly we have to disable any virus protection software.
I have also installed the 8.5 version of LV runtime engine on the macbook with Leopard 10.5.x OS. I can see the LV plugin with the proper version in the Installed plug in check for the Safari browser. But every time the Remote panel is accessed I get a missing plugin message.
Here is the message:
Safari cannot find the Internet plug-in.
The page “Blackboard Academic Suite” has content of MIME type “application/x-labviewrpvi82”, but you don’t have a plug-in installed for this MIME type. A plug-in should be available on this page:
http://digital.ni.com/express.nsf/express?openagent&code=exck2m&
Do you want to open the page?
The page it suggests is the NI site for the plugin download?
I am really in a corner and donot know what I am doing is wrong? Any help will be appreciated?
Vishnu

I'm not a Mac expert, but it sounds like you are missing the LabVIEW Browser Plugin which is necessary to view remote front panels. That plugin installs with the LabVIEW runtime engine which you can find here. I don't think Safari requires any extra configuration to work with the plugin but it might... let us know if installing the runtime engine doesn't resolve the problem.
Travis M
LabVIEW R&D
National Instruments

LABVIEW NXT LEGO firmware problem

hi everybody
i am trying to connect LEGO NXT mindstorm robot with labview, i installed the latest version of LABVIEW toolkit. but when i tried to connect the NXT it gives me this error which i dont understand why, because i have latest version of toolkit installed in my PC with LABVIEW 8.6, and the upgraded firmware in NXT i.e 1.05 . even though i tried with 1.04 and 1.02 but it is still giving me the same error(attached). some one has idea whats wrong on my side?
thanks
looking forward
Regards
hussain..
Solved!
Go to Solution.
Attachments:
LEGO error.JPG ‏84 KB

The latest NXT toolkit release is 2.0, which has been posted recently. If you are using this version of the toolkit, the firware version should be 1.26. If you have installed NXT toolkit 2.0, you can update your firmware to 1.26 using Tools>>NXT Modules>>Update firmware.
To download 2.0, please follow the instructures on this page:
http://zone.ni.com/devzone/cda/tut/p/id/4435
Please let us know if this solves the problem.

Labview slider event handling problems

Hi,
I've faced problems while working with sliders, which values are passed to serial device. I am using events, and here is a problem: if i use "Value changed" event and change slider position by moving a mouse, the event is generated a few times (i.e. event is triggered by every single value on a slider). It means, that I have to transmit intermediate values to my serial device in order to set the last one. I tried to change event "Value changed" to "Mouse Up", but there was another problem: the value doesn't change if mouse leaves control element area (i.e., "mouse up" is generated as VI event, not as slider event). It would seem to be OK, but slider position is already changed, and there is no other variable which stores
value of current slider position! I mean that value and slider position are different and I don't know how to synchronize them. Using "Mouse Up" event for whole VI is not a good solution for me, because I have multiple sliders to control separately.
How to create non-redudand and efficient slider handling? Any ideas?
(Please see attached VI example)
Thank You
Vitalijus
Attachments:
slider_events.vi ‏34 KB

You need a 2 states machine. First state waits for "Value Changed". Once a change is detected, you know that the user is editing the slider and the mouse is currently used to move the slider. Second state waits for "Mouse Up" to latch the actual value of the slider.
See http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=50650000000800000046670000&ECategory=LabVIEW.LabVIEW+General
where I gave an example not using the event structure but a picture control to detect mouse up and a shift register to detect changed values.
LabVIEW, C'est LabVIEW

LabVIEW 2009 Build Path Problem

[Cross Posted to LAVA]
I had some code that worked fine on my home PC, when I moved it to work, the exe would not build due to errors.
The errors coming back weren't that good at explaining the problem
Until I got this one:
Look at the path in the error:
C:\Users\Developer2\Desktop\User Group Meeting\LabVIEW 2009 new features\code\02 intermediate\01 build specifications\build executable file paths\dist\application 9.0\my application.exe\LabVIEW 2009\vi.lib\addons\_ICON Library\String\_icon_lib_string.llb
That path is referring to a VI inside my executable!
This may be a bigger issue that I first thought
So my question is:
If a have a path inside my build that would be relative to the executable and LabVIEW needs to resolve it, could that process fail depending on where the exe sits in a folder hierarchy?
I guess this could have happened before? but it would be more likely now due longer paths!
Message Edited by jg-code on 08-26-2009 05:20 AM
Certified LabVIEW Architect * LabVIEW Champion
Solved!
Go to Solution.

Solution in cross post
Certified LabVIEW Architect * LabVIEW Champion

Labview Runtime Engine installation problem with OSX

I tried to load the LabView Runtime 7.0 Engine for Mac OSX Says it's installing in my Applications folder and seems to be downloading the files. However, nothing is in the Application folder (and nowhere else on the HD). If I try to run a vi, it can't locate the program. If I try to reinstall, it says the files are already there. Can someone please help me with this problem?

> I tried to load the LabView Runtime 7.0 Engine for Mac OSX Says it's
> installing in my Applications folder and seems to be downloading the
> files. However, nothing is in the Application folder (and nowhere
> else on the HD). If I try to run a vi, it can't locate the program.
> If I try to reinstall, it says the files are already there. Can
> someone please help me with this problem?
I suspect the runtime is in a folder called National Instruments. You
might just do a Finder Search for that folder or for LabVIEW and see
what shows up. If you logged out and back in again between installation
and execution, it could be a permission problem.
Greg McKaskle

Labview Vision Assistant Histogramm Problem

Good Morning,
i sadly with the Vision Package from Labview. I want to load a picture and interpretation a detail of the picture with black, white and grayvalve. This can i make with the Vision Assistant feature Histogramm. When i build it (the VI with Vision Assistant) comes nothing to the output Histogramm. I have checked the output line Histogramm, but nothing goes out of this.What are my failure?
Thanks a Lot
german translation:
Hallo zusammen,
ich bin leider noch nicht richtig mit dem Vision Paket vertraut. Ich möchte die Schwarz, Weiß und Grauwerte eines Bildausschnittes auslesen und diese auswerten können. Dank des Vision Assistant, kann ich dies per Mausklicks erzeugen, jedoch erhalte ich am Ende des Vis keine Daten. Selbst wenn ich die Quelle verbinde und ein Anzeigeelement hinzufüge, kommt hinten nichts raus. Was ist mein Fehler?
Vielen Dank
-motecpam
Labview Vision 2011 Servicepack 1
with Vision Development Modul
Attachments:
Screenshot_VI.jpg ‏230 KB
Screenshot_Vision_Assistant.jpg ‏313 KB

Hallo Tropper,
vielen Dank erstmal für die Antwort.
Leider erhalte ich dennoch keine Ausgabe am Histogramm.
Das Histogramm wird mir leer angezeigt.
Ich habe es so erstellt, wie von dir gezeigt.
Attachments:
Unbenannt.jpg ‏117 KB

Programatically Creating LabView Step in TestStand Problems

I am writing a LabView App that generates TestStand Sequences.
When programatically 'specifying the module' of a TestStand Step calling a LabView VI, is it possible to set the values of the parameters passed to the VI by Name? I am currently creating steps fine, but the only way I can set parameter values is by using the parameters index.
It would be really nice if I could reference the parameters by the name specified in the VI rather than the index derived when the VI is created.
Any ideas?
Steve
Message Edited by SercoSteve on 01-26-2006 05:58 AM
There are 10 types of people in the world that understand binary, those that do and those that don't.

Sorry Sam my fault
Hopefully these are all of the SubVIs and SubSubVis
regards
https://decibel.ni.com/content/blogs/DailyCLAD
Attachments:
SpecifySeqModule.vi ‏19 KB
SpecifySeqPassFailAction.vi ‏20 KB
SpecifySeqCallParams.vi ‏26 KB

Fixing a NXT LabVIEW Toolkit compile/load problem

I bought myself a Lego NXT Mindstorms to play with. I'm using the LabVIEW 8.5.1 from the FIRST Robotics competition and I downloaded the NXT Toolkit for Labview.
I did a mass compile on the toolkit (like the getting started said to) and did the excersize. I get the following error:
Error 1003 occured at Invoke node in NXT Toolkit.CompileOrCancel.vi->NXTToolkit.Target.Agent.vi
Possible Reasons:
LabVIEW: The VI is not executable... It said to do a file->open.
Method Name: Run VI
VI Path: C:\Program Files\National Instruments\LabVIEW 8.5\vi.lib\addons\NXTToolkit\gcomplier\Backend.LEGO\NXT.Compiler.Core.vi
The vi was broken but it had a password to open the view so I couldn't tell what was going on.
What do I do to fix this?
Thanks
"Lockheed" Joe
Testing Blog"

Hey Joe,
The Lego NXT Mindstorms and the LabVIEW Toolkit for the Mindstorms are officially supported by Lego's Technical Support. Check out this knowledgebase for a little more information regarding how to get the quickest support for your Mindstorms NXT issue.
Hope this helps,
Ben
Hope this helps.
-Ben
WaterlooLabs

Labview - HP E3631A PowerSupply Problems

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