Amateur Radio Labview Applications

In the past few years, Radio Amateurs have discovered the glories of software defined radios, SDRs. However, not every ham knows that Labview preceded the concept of SDR radios by quite a wide margin. Being able to reprogram a radio's functions on the fly is much like redesigning a VI.
I wonder how many other Labview developers have been looking at some really cool Amateur Radio control and processing applications. Is there a potential that we could provide a low cost Labview development suite just for these applications? This would be a great way of getting Labview into a lot of creative and capable hands....and a potentially lucrative market.
Just some thoughts. By the way, I have recently received a special grant to operate a transmitter on 500KHz, as a member of the ARRL 600 meter experimental group. Extremely weak signal processing, such as used in this project, would be an ideal use for Labview. For background on this project, check out www.500kc.com
Just some thoughts,
Eric P. Nichols, KL7AJ, WD2XSH/27
Eric P. Nichols
P.O. Box 56235
North Pole, AK 99705

Howdy!
Actually, North Pole is a small town about 15 miles SE of Fairbanks. Quite a few Labview users here....don't know about the REAL North Pole, though!
Anyway, I don't have my 500kc station up yet, since I was JUST given the grant....but plan on having something up and running this winter.. Mose of the folks doing this are using REAL slow CW and DSP programs like those used for PSK31.....totally inaudible signals for the most part.
Eric
Eric P. Nichols
P.O. Box 56235
North Pole, AK 99705

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LabVIEW Application throws Error in Run VI Invoke node

Hi All,
We are facing an issue with an application developed from LabVIEW 2010SP1.
Application Description:
In our application, there is a top level VI which tries to run VIs dynamically[using Run VI invoke node] from a particular folder. This folder is like a plugin - not part of Exe. This implies when the top level VI is launched, the plugin VIs under particular folder will not be in memory. When we try to run a VI dynamically from the top level VI, the VI execution works perfectly in LabVIEW development mode.
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When we created an EXE, it worked well in my PC [LabVIEW is installed]. We created an installer and tested in few other PCs.
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Error 1003 occurred at Invoke Node
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Method Name: Run VI
We tried the following possible ways to find the reason for the issue:
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4. When .net 2.0 is uninstalled the EXE itself is broken.
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Note:
1. The VIs which are dynamically called is a plugin and not a part of EXE.
2. These plugin VIs have no dependencies from vi library and is completely isolated.
3. We are not using any .net related objects in any of the VIs.
4. The plugin VIs use Call library function node in which a C DLL developed from Microsoft Visual Studio 2010 is used.
Thanks,
Meena
Solved!
Go to Solution.

Error 1003: This clearly indicates that the 'Dynamic VI' is broken and now you should check for the various reasons, why the 'Dynamic VI' is broken.
Also path of 'Dynamic VI' is not a problem.
One thing that you may try is:
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Hope this solves your issue.
I am not allergic to Kudos, in fact I love Kudos.
Make your LabVIEW experience more CONVENIENT.

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Best regards,
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Try to take over the world!

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MTO

Failure to build LabVIEW application on Linux using "Shared library"

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Solved!
Go to Solution.

Hi Julian,
gcc is a C and C++ compiler on Linux. An easy way to check if it is installed is to open a terminal and type "gcc", if the command is recognized then the package is already installed and the problem must lie elsewhere. If this distrobution of Linux has a package manager included then it should be displayed in there as well. If not then it could point to it being not installed or some dependency is missing making it not accessible from the command line. Here is a link that should hopefully step you through installing gcc with Redhat: http://www.cyberciti.biz/faq/centos-linux-install-gcc-c-c-compiler/ .
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http://www.ni.com/support/

Stop labview application from MS VC got internal error: image.cpp line 11450

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Thank you!
ls

> So is there any other ways to stop labview application from VC
> program?
You can use ActiveX. Turn the server on for your built app, open a
connection from VC, and use the app or VI properties to get LV to exit.
Greg McKaskle

How can a LabVIEW application be run from the guest account in Windows 7?

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LabVIEW Champion . Do more with less code and in less time .
Solved!
Go to Solution.
Attachments:
LabVIEWGuest.png ‏36 KB

Ah, I missed that article somehow. Thanks!
I actually already made a "labguest" account yesterday with normal user permissions and that works fine.
LabVIEW Champion . Do more with less code and in less time .

LabView application hangs up when scrolling the block diagram

Hi all.
I attached you "Main.vi" that is part of my LabView project. I don't know what's going on, but when I scroll the block diagram to the maximum right, the LabView application hangs up. There are a lot of things in this block diagram because is an outline yet. My plan was to make it more structural, but now I can't do anything because this error don't allow me to edit the diagram.
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Regards,
Francisc
Hi all.
I attached you "Main.vi" that is part of my LabView project. I don't know what's going on, but when I scroll the block diagram to the maximum right, the LabView application hangs up. There are a lot of things in this block diagram because is an outline yet. My plan was to make it more structural, but now I can't do anything because this error don't allow me to edit the diagram.
Please, try to open it (ignore all the dependencies) and check if it hangs up also in your computer.
If it does, is there any way to recover it? It's really important for me because I don't have any backups since two weeks ago...
Regards,
Francisco
Attachments:
Main (v3.1).vi ‏257 KB

It didn't hang up on my computer, but it did make me nauseous, luckily I keep a bucket by my desk.
You might have video card issues. Try this: open the VI, and hit Auto Cleanup, then save. Close LabVIEW, reopen. If that does not work, try to get to the far right side by going to the Front Panel, and double clicking something that will take you there. If you get there successfully, use the disable structure to disable ~ 1/8 or more of the diagram on that side. Save, reopen.
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LabVIEW application fails to run properly at Windows startup

I have experienced problems with my Labview application after putting it in the Windows XP startup folder. The application runs perfectly if I start it manually but whenever I get Windows XP to start it after boot-up, I see various error messages. My application uses calls to the NIMotion library and it's these calls that are generating the error messages. I don't always get the same errors and the problem has occurred with two different programs on two different computers. I think it is something to do with NI services for the motion controller that load at startup and haven't yet been started before my application runs. I have configured Windows to login automatically and I have noticed thay my program executes quite early, sometimes even before the desktop icons appear.
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David Reeves

Sorry dreeves, I don't have an answer for you. I would like to know the solution myself. I had similar problems recovering from a standby state.
DAQmx takes a while to get going for USB devices and the queue functions didn't recover properly at all. I just sat in a loop checking the status of my attached devices until they initialised properly then moved on from there.
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Troy
CLDEach snowflake in an avalanche pleads not guilty. - Stanislaw J. Lec
I haven't failed, I've found 10,000 ways that don't work - Thomas Edison
Beware of the man who won't be bothered with details. - William Feather
The greatest of faults is to be conscious of none. - Thomas Carlyle

Invoke Labview application from Command line

hi,
I have a labview program which does some analysis on my Test data.
My application is that,i have a Test sequencer program(Different application) which collects data and stores it in .dat file.
After this i invoke exe of Labview Analysis program from Test sequencer & i enter the Test data filename as a command line argument.
My first step in analysis program is read command line argument(thru App.Args property) & get filename(the command line gives array output , index 0 will be Labview,index 1 will show filename)
This works absolutely fine.
I made a copy of this analysis prog to include some more functionalities and renamed it as different Labview program(prog structure is same) & trying to do the same abovesaid process.
But somehow im not able to get Command line arg(basically here filename) passed to labview.
The error im getting is that it's showing the path of my application (say if my application is in C)."C:\xxxx.dat is not a LABVIEW data file".
My question is:
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-Murali

Just to confirm I understand what you are asking... you copied the App.Args property from one vi to another, compiled the new vi to an exe, new exe doesn't receive the command line parameters.
Did you make sure the "Pass all command line arguments to application" check box (in the 'Advanced' category of the application builder) was checked for the new application?
Troy
CLDEach snowflake in an avalanche pleads not guilty. - Stanislaw J. Lec
I haven't failed, I've found 10,000 ways that don't work - Thomas Edison
Beware of the man who won't be bothered with details. - William Feather
The greatest of faults is to be conscious of none. - Thomas Carlyle

Determining how a LabVIEW Application was launched

Does anyone know of a way to programmatically determine how to a particular LabVIEW application was started? My setup will involve multiple LabVIEW executables. One of these is the main, top level, program. The others are basically script libraries that are also compiled into executables. I choose EXE's as opposed to DLL's because with DLL's you have to basically hard code the link inside the main program. With EXE's I can add/remove new test libraries without having to rebuild my main program. The only problem is that the test library EXE's will not really work properly if run without the main program. So I would like to find a way to have the test library try to determine if it was launched by th
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Andy Brown
Averna

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Averna

Multi-languages labview application

Hi,
Is it possible with labview to do a multi-languages application?
I want the user to be able to select language in the execution menu, then,
it will translate all label with languages information from a configuration
file.
I know haw to use configuration file, but i don't know how to change all
label easily.
Can anyone help me?
Regards,
Jean-Michel.

Hi,
"jm" wrote in message
news:3e2e75cc$0$226$[email protected]..
> Hi,
>
> Is it possible with labview to do a multi-languages application?
> I want the user to be able to select language in the execution menu, then,
> it will translate all label with languages information from a
configuration
> file.
>
> I know haw to use configuration file, but i don't know how to change all
> label easily.
The easiest way is to make a recursive vi. This vi would read a
configuration key, e.g. viname.tabname.clustername.controlname= "some text".
The recursive vi must look for the viname. Then it should get all objects,
and find a refernce to the tabname. Then it should find all names (on the
tab) again, and find the clustername. Then it should find all name
s (in the
cluster) and find the control name.
In pseudo code:
for all keys in the section of the selected language:
ref= vi ref of the first name
while there are names in the key
get all controls that are in ref
find the ref with the proper name
endwhile
set the name of the reference to the name in the key
endfor
Regards,
Wiebe.
> Can anyone help me?
>
> Regards,
> Jean-Michel.
>
>

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