Loss serial input with re install of Labview

I have an existing VI that is trying to connect through Com 1 to an Emveco testing machine. The hard drive crashed and I am trying to re install LabView on a new hard drive. When I run the VI in the new installation, it does not seem to communicate to the testing machine. I have opened hyperterminal and can see the data coming in the serial port. I am not sure if I loaded the correct driver for serial communications and also I not not sure how to check to see if the serial comm. settings are right in LabView

Hello -
It appears that your hardware is working, as verified by hyperterminal. Therefore, the problem most likely is with the software.
Are you receiving any error messages? Or does the serial port just appear to not communicate when the VI is run?
What version of LabView are you using? Did you install the same version on the new hard drive?
Does your program use VISA? You may not have VISA installed on the new machine and this may be causing the problem. You can verify that VISA is installed by opening Measurement and Automation Explorer and expanding the software list in the left column by clicking on the "+".
Have you tried to verify serial communication in LabView by running one of
the example VIs? Try to run the LabVIEW <-> Serial.vi found in the Example Finder >> Hardware Input and Output >> Serial folder.
Additional Resources:
The current serial driver for your Operating System is located here.
This KnowledgeBase discusses some common problems with serial communication and possible solutions.
Let me know if any of these suggestions solve your problem. If not, please provide more information and I will continue to research the issue. Have a great day!
Becky B.
Applications Engineer
National Instruments
Becky Linton
National Instruments
Field Engineer
Office: 734-464-2463
Cell: 248-709-2822
Email: [email protected]

Similar Messages

Asynchronous serial input with an sbRIO FPGA

Background:
As part of my capstone project, I'm trying to read data transmitted serially from an IMU. The host is an sbRIO 9602.
As far as I'm aware, the protocol is not exactly standard: data is sent asynchronously in packets. Each packet consists of 12+ bytes in immediate sequence, each having a start and stop bit, and then the line goes idle [high] until the next packet. Each data byte is preceded by a frame bit, and only contains 7 bits of actual data, so the packet has to be further processed to get actual useful data.
I've seen the FPGA serial I/O example program floating around. The code I inherited was actually based on it, but it's overly complex for this application, and I'm not convinced it would actually work for this protocol at all. I couldn't get it to work, at any rate. I rewrote the sampling code in its entirety twice trying to get it to work, but haven't made a lot of progress. -On the bright side, the current VI is much simpler and more straight forward than my first attempt...
The problem:
I can read the first 70 or so bits of a packet fine, then the program skips a bit. That throws off the start/stop bits, and basically renders everything after meaningless. In this screenshot the data is as read in, in order from top to bottom:
I'm fairly certain this means my sampling interval isn't perfect [this suggests about 1.4% too long], but I'm totally stumped on how to avoid it. What's worse, this is actually on the lowest possible output setting from the IMU, 2400 baud. Realistically, we're hoping to have it working at either 230.4k or 460.8k baud.
The prior version of my code had the packet being read in 10-bit [1 byte] chunks, processing, then reading the next chunk. I encountered exactly the same error. I assumed that having too much code in the sampling process was causing the timing to be thrown off, so I changed it to read off the entire packet into a bit array and then process it afterward [while no data is coming in]. I've attached this version of the code for reference. It's cleaner, but no change as far as the error is concerned.
Am I correct in my evaluation, or is there something else going on? More to the point, is there a way of fixing or working around the problem so that I can get reliable samples [even at 100-200x the bit rate]?
As an aside, I've only been working with LabVIEW for a couple weeks; please tell me if I'm using poor habits or doing anything incorrectly.
Any help will be immensely appreciated. Thank you.
Attachments:
IMU_serial_in.vi ‏61 KB

Hi Ryan,
I have a suggested methodology, but I don't currently have any example code to share that would get you started.
The challenge you have is even if you sample at the exact right baud rate of your incoming signal, the phase of the FPGA clock will not be exactly the same as the source signal. Now complicate that with your sample frequency and baud rate will always be slightly different, and you will get the sampling drift effect you described where data eventually is clocked in wrong. On short transmissions, this may not be a problem because the sampling can be re-aligned with a start bit, but for long, continuous streaming, it eventually fails as the sampling and source signals drift out of phase.
I would suggest over-sampling the DIO line, using a debounce filter if necessary, and use a measured time between edge detections to constantly adjust your sampling period and phase to keep your sampling aligned with the incoming data.
The proposed LabVIEW code I imagine would be a single-cycle timed loop based state-machine. Essentially the state machine could detect edges that occur near the baud rate you expect to receive, and then would adjust the sampling period to ensure you are sampling the data inbetween transitions while the incoming waveform is stable.
With this method running at 40MHz, you would essentially have ~43 clock ticks/samples of each clock cycle at 921.6kbps, and you should be able to pull out the right samples at the right time in the waveform.
Hope this helps, and if I find a good example of this, I'll send it your way.
Cheers,
Spex
National Instruments
To the pessimist, the glass is half empty; to the optimist, the glass is half full; to the engineer, the glass is twice as big as it needs to be...

Have photoshop cs6 for windows and am now migrating to a mac with Yosemite installed. Where can I download the cs6 for mac? And can I use the same serial no that I received for windows.

Have photoshop cs6 for windows and am now migrating to a mac with Yosemite installed.
Where can I download the cs6 for mac? And can I use the same serial no that I received for windows.

You need to run a platform swap:
Order product | Platform, language swap
Until it's through, you can use the trial version.
Download CS6 products
Mylenium

Finding the serial number for an installed copy of Labview 6.1

I have a copy of Labview 6.0 (Full Development System) and also Labview 6.1. I was able to find the serial number label in the package for version 6.0, but not for 6.1. I do have 6.1 installed and working on my workstation. Is it possible to determined the serial number for an installed copy of LabView?
Would the serial number for version 6.1 be the same as the serial number for version 6.0 that I upgraded from?

That's what I expected, however the window that pops up when I select Help->About LabVIEW contains only the following information:
LABVIEW 6.1
TCP Server inactive
Memory Allocated: 13296K
Using unbound threads
Version 6.1f1 - Click in window to continue
Patent Information (link)
ni.com/labview
Copyright 2001 National Instruments. All rights reserved.
National Instruments (logo)

Serial port with msp

Hello
I have a clock board with serial inputs. I want to send in numbers to the board with MSP to set the frequency of the msp clock. i want to make a nice interface in labview that takes number from the user and sends it to the serial input of the board. i have tried looking at the examples and when i tried it is giving me errors and i am not that familiar with lab view. the documents in the fourum were created in labview version 8 and i have version 7 so i couldn't open them, could you please help me solve my problem.
Thanks in advance

Hi,
What do you mean with MSP a MSP430 from Ti ?
Is there a application running on this board ? Did already tried something in LV ?

How to run downloaded drivers on Fresh Install of Labview 6.1 on a Mac G4 OS 9

I have just completed a fresh install of Labview 6.1 on an Macintosh G4 running OS9. I can run it and it seems to work just fine. I downloaded some drivers for an oscilloscope (HP 546XX) to run with an HP 54603b. When I installed, I went to open the 'Get Started.VI' I get a freeze and have to force quit out of labview. I am not sure how to resolve this. I am pretty sure that it is independent of the device, since I can open the vi's at least on another computer with no hardware attached. So I guess to boil my situation down. I have 2 questions:
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a macintosh to run properly.
I really have little experience with macs so I am not really sure what my options are or what could be the problem so any assistance would be much appreciated.

Hmmm. I wonder if NI-VISA isn't installed correctly on this machine.
When LabVIEW loads a VI that uses a VISA name control on the front panel, it queries VISA for the installed devices. Sometimes this takes a few seconds, but maybe in your case, something has been corrupted and it's hanging.
To try to narrow this down, first run the separate program "VISAConfig". This should list your devices. If this works, this means it's pretty likely that VISA is installed correctly.
Next, run LabVIEW. On an empty front panel, select the "Controls->I/O->VISA Resource Name" and place it on the front panel. When you click on the arrow on this control, you should see a list of your devices. If this works, then that indicates that LabVIEW is successfully talking
to the VISA software.
If both of those succeeded, then we have to take a closer look at this particular instrument driver. Can you drop other VIs (say, Initialize or Close) without hanging?
If either of the first two steps fail, I'd suggest that you reinstall the VISA software. You may want to try the latest version of NI-VISA (from ni.com), but first confirm that it supports LabVIEW 6.1.
I hope this helps.
Brian

Synchronizing two counter frequency inputs with multiple analog inputs

Hello all,
I'm fairly new to LabVIEW and I'm trying to collect data from multiple sources with synchronized timing on the acquisition but I'm having trouble figuring it out. My problem is that I've got two counter frequency inputs, one optical tachometer reading one pulse per revolution, and a max machinery flow meter with a k factor of 12000. I can't seem to figure out how to sync the timing with my multiple analog inputs. I've been attempting to get the tachometer to sync with the analog inputs first by following the example linked here. (https://decibel.ni.com/content/docs/DOC-10785) So far each time I run it I either get a timeout error on the DAQmx read or a "Multiple sample clock pulses were detected" error (see attached image). It seems if I slow the sampling rate way down to say 10 hz and ensure that the tachometer signal is over 800-1000 RPM (13-17 Hz) before starting the VI then the program will run without errors until the RPM drops below that threshold then the "Multiple sample clock pulses" error occurs. The code is attached below.
Does anyone know of a more effective way of syncing counter frequency inputs with analog inputs? I'd like to have a VI that can show 0 RPM (and eventually 0 flow as well, but I think I need to figure out the timing of one counter before I add another as it seems I can't have two counters in the same task). Any help on this would be greatly appreciated.
LabVIEW version 13.0
cDAQ-9178 Chassis with NI 9401 for the two counter inputs and NI 9205 for the analog inputs.
Thanks!
Richard
Solved!
Go to Solution.
Attachments:
SimpleDAQ.vi ‏44 KB
LV_Error.JPG ‏31 KB

Maybe third times the charm?
So I've finally got a good handle on why the VI is having problems at low RPM though I'm somewhat embarassed how long it took me to do that
Because I have the counter time synced to my Analog input task if it doesn't see at least two pulses between the two clock pulses set by the analog input task I get the -201314 "Multiple sample clock pulses" error. This seems fine at first as it just sets a minimum RPM that I can measure and it's well below the area I'm interested in so no problems there. I tried a simple error handler that would clear the error when it happend assuming the loop would keep iterating until the RPM went above that minimum at which point I would get a signal again. This is not the case, the read function just continues to spit out the -201314 error even after the RPM is back in the readable range. So then I tried adding two case structures so that when the error occured it would stop the task, clear the error, and then start the task again on the next loop iteration (Code Attached). This also doesn't work as the error shows up again on the stop task and then AGAIN on the start task on the next loop iteration. It seems this error is not actually being cleared and once it happens it stays with the task regardless of what the error cluster is carrying.
Anyone have any ideas? The only solution I can think of is to just clear all tasks and recreate them each loop iteration until the RPM is readable again but that strikes me as a horribly clunky solution.
Richard
Attachments:
SimpleDAQ_1_Start Stop.vi ‏48 KB

Issues with windows 7 after Labview 2012 installation

Hi
I am having some issues after installing Labview 2012 on machines running Windows 7. Firstly, after installing a program on a user's machine, the machine sometimes takes 20 minutes to boot up before the user can log on. The 'Please Wait' message appears during this time. This is also the case on the development machine.
Secondly, on the development machine, I am having an issue when trying to run compiled programs created in Labview. When installing, everything works fine but when I go to open the program, it appears on the task bar for a brief period before closing. It does not appear in the task manager either. I have tried this on 2 other machines with windows 7 and Labview installed and still get the same issue.
Any help on these matters would be much appreciated. Thank you

Hi
Firstly, looking at the issue with the slow Windows 7 boot up time, as Norbert_B suggested the Windows Event Log is a good starting point to find the root of the problem. The following link describes how to launch “Event Viewer” and some common problems:
http://itexpertvoice.com/home/what%E2%80%99s-taking-so-long-how-to-fight-slow-startup-times-in-windo...
Aside from that, if your computer is part of a domain, the problem may be connected with certain Windows Services that start automatically on boot up. I recommend trying the following steps:
Open up “Control Panel” go to “System and Security” then “Administrative Tools” from here launch “Services”.
Sort the list by name and scroll down to “Network Store Interface Service” right click and select “Properties”. Under the startup type dropdown select “Automatic (Delayed Start)”.
Next scroll down to the “WebClient” service again under “Properties” this time select “Disabled” under the startup type.
As for the problem with running LabVIEW executables, I have a few questions:
Do you get any error codes when it closes automatically?
Does this occur for multiple executables or just one in particular?
Does the code run without a problem within LabVIEW?
Have you tried to update LabVIEW?
What hardware are you running?
Without this information I can only think it may be caused by the Windows Data Execution Prevention (DEP) security feature. So you can try the following steps:
Right click on “Computer” and select “Properties”.
Click on “Advanced System Settings” and select the “Advanced tab, then under the performance section click “Settings”.
Click the “Data Execution Prevention” tab.
Make sure it is activated for essential Windows programs and services only, or you have an exception for your EXE.
You may also find the following link helpful on debugging applications:
http://zone.ni.com/reference/en-XX/help/371361H-01/lvhowto/debug_apps_dlls/
Let me know if these solve the problems.
Andrew.N
Applications Engineer
National Instruments

How can I continue using my CS3? I needed to install a new hard drive, & CS3 wont accept my serial # on the re-install :-/

How can I continue using my CS3? I needed to install a new hard drive, & CS3 wont accept my serial # on the re-install :-/

Unfortunately, only Adobe customer service can assist you with your issue. These are user forums; you are not addressing Adobe here.
Click on the link below, and after that click on "Still need Help? Contact us."
Then on the next page, click Chat
There is also a phone option.
http://helpx.adobe.com/contact.html?step=PHXS_downloading-installing-setting-up_licensing- activation

I bought a new mac with software installed and my username will not update from another account?

I recently bought an new power mac with Logic Pro and Final Cut Pro Installed.
When I updated to the new OS X operating system, they need to be updated as well. And will no longer work.
But it says it is on another account. Not sure what account. How do I find out what account they are on? How or can I do I move them into my other account?
The Power Mac is registered to the account I am logged in on.

Before buying a second-hand computer, you should have run Apple Diagnostics or the Apple Hardware Test, whichever is applicable.
The first thing to do after buying the computer is to erase the internal drive and install a clean copy of OS X. You—not the original owner—must do that. Changes made by Apple over the years have made this seemingly straightforward task very complex.
How you go about it depends on the model, and on whether you already own another Mac. If you're not sure of the model, enter the serial number on this page. Then find the model on this page to see what OS version was originally installed.
It's unsafe, and may be unlawful, to use a computer with software installed by a previous owner.
1. If you don't own another Mac
a. If the machine shipped with OS X 10.4 or 10.5, you need a boxed and shrink-wrapped retail Snow Leopard (OS X 10.6) installation disc from the Apple Store or a reputable reseller—not from eBay or anything of the kind. If the machine is very old and has less than 1 GB of memory, you'll need to add more in order to install 10.6. Preferably, install as much memory as it can take, according to the technical specifications.
b. If the machine shipped with OS X 10.6, you need the installation media that came with it: gray installation discs, or a USB flash drive for a MacBook Air. You should have received the media from the original owner, but if you didn't, order replacements from Apple. A retail disc, or the gray discs from another model, will not work.
To start up from an optical disc or a flash drive, insert it, then restart the computer and hold down the C key at the startup chime. Release the key when you see the gray Apple logo on the screen.
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If you already own another Mac that was upgraded in the App Store to the version of OS X that you want to install, and if the new Mac is compatible with it, then you can install it. Use Recovery Disk Assistant to prepare a USB device, then start up the new Mac from it by holding down the C key at the startup chime. Alternatively, if you have a Time Machine backup of OS X 10.7.3 or later on an external hard drive (not a Time Capsule or other network device), you can start from that by holding down the option key and selecting it from the row of icons that appears. Note that if your other Mac was never upgraded in the App Store, you can't use this method.
3. Partition and install OS X
a. If you see a lock screen when trying to start up from installation media or in Recovery mode, then a firmware password was set by the previous owner, or the machine was remotely locked via iCloud. You'll either have to contact the owner or take the machine to an Apple Store or another service provider to be unlocked. You may be asked for proof of ownership.
b. Launch Disk Utility and select the icon of the internal drive—not any of the volume icons nested beneath it. In the Partition tab, select the default options: a GUID partition table with one data volume in Mac OS Extended (Journaled) format. This operation will permanently remove all existing data on the drive.
c. An unusual problem may arise if all the following conditions apply:
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In that case, you won't be able to unlock the volume or partition the drive without the FileVault password. Ask for guidance or see this discussion.
d. After partitioning, quit Disk Utility and run the OS X Installer. If you're installing a version of OS X acquired from the App Store, you will need the Apple ID and password that you used. When the installation is done, the system will automatically restart into the Setup Assistant, which will prompt you to transfer the data from another Mac, its backups, or from a Windows computer. If you have any data to transfer, this is usually the best time to do it.
e. Run Software Update and install all available system updates from Apple. To upgrade to a major version of OS X newer than 10.6, get it from the Mac App Store. Note that you can't keep an upgraded version that was installed by the original owner. He or she can't legally transfer it to you, and without the Apple ID you won't be able to update it in Software Update or reinstall, if that becomes necessary. The same goes for any App Store products that the previous owner installed—you have to repurchase them.
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a. If the original owner "accepted" the bundled iLife applications (iPhoto, iMovie, and Garage Band) in the App Store so that he or she could update them, then they're irrevocably linked to that Apple ID and you won't be able to download them without buying them. Reportedly, Mac App Store Customer Service has sometimes issued redemption codes for these apps to second owners who asked.
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c. When trying to create a new iCloud account, you might get a failure message: "Account limit reached." Apple imposes a lifetime limit of three iCloud account setups per device. Erasing the device does not reset the limit. You can still use an iCloud account that was created on another device, but you won't be able to create a new one. Contact iCloud Support for more information. The setup limit doesn't apply to Apple ID accounts used for other services, such as the iTunes and Mac App Stores, or iMessage. You can create as many of those accounts as you like.

Migration from Serial polling to Serial queue with event handler

Hi, I am trying to migrate from classical serial polling communications to serial queue with "event handler" for the buttons pressed by the user. I have placed four while loops, one for the event handler, a second one for serial reading, a third one for serial writing (depending on what button was pressed) and the last one for processing what was read from the serial reading while loop, via a queue.
My attached device reads the signals from 8 sensor ( 4 temperature and another 4 temperature plus humidity in the same sensor ) and send them via serial to Lavbiew.
First of all, only once just after running the LV program, I must turn on my attached device with an ON command plus a carriage return after that the device will respond with the number of sensors plugged to it, disabling the corresponding buttons in the front panel. Then labview must wait until I pressed Acquire Button (event handler) and send a CF command plus what sensors to acquire plus a carriage return, then the device will respond continuously to labview with the sensor readings until I press the stop button (event handler), there is also another button to exit the program, also with event handler.
I am having problems using the event handler and the queues because I am new using these structures, I have looked at the LV examples but there is nothing concrete on using serial with event handler and queue.
Take a look at my VI and you will soon notice what kind of problems I am having, any suggestions will welcome.
Thank's in advance.
Regards.
Attachments:
serial queue.zip ‏76 KB

Hi Luisete,
Maybe the problem arise because you are En- and DeQueue in parallel. You do a lot of things in parallel, that is nice if you are sure that one loop doesn't have to wait for another loop. Make sure you don't dequeue before enqueue.
Hope this helps
I never knew that the standard error cluster output could be wired directly to the loop control of a while loop.
First time I see this

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I don't know that you can purchase Adobe software in the US for installing and using outside of the US.
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http://helpx.adobe.com/x-productkb/global/service1.html ( http://adobe.ly/1aYjbSC )

Lightroom 5 disappears with CC Install

It would appear that my licensed copy of Lightroom 5, which I downloaded online, has disappeared with the install of CC. In my dock I have a question mark on the Lightroom icon. And installing from CC asks for a license number. Is there a way to retrieve my license?

CC products are licensed when you are logged into CC and not when you’re not so if you are installing the CC version of LR then you need to be logged into CC when you are doing it. I am talking about being logged into the CC Desktop app running locally on your computer, not just logged into the creative.adobe.com site when you download it.
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When I got the PS+LR CC bundle a few months back, my LR 5-CC wouldn’t even show up in the CC listing prior to my uninstalling the non-CC LR and then explicitly logging out and back into the CC-Desktop app to get it to rescan what local software I had and compare it to what I was licensed to use through CC.
After I uninstalled the LR 5 on-CC, and logged out and into CC-Desktop, LR CC showed up in my CC Desktop as a valid app to install, and when I did that, the serial number as filled in automatically, because I was logged into CC at the time I did the install.
It’s not clear to me what LR your shortcut was to and where you’re installing the new one from. I am on Windows, so the Mac versions may work a little different, and Adobe may have changed how CC works a little so it may allow the LR-CC version to install over the top of the LR non-CC version without uninstalling the non-CC version.
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Installing of LabVIEW runtime is cause of InTouch can't find its licenses

Hello All.
I need to run executable built with LabVIEW from Wonderware InTouch 2012 runtime. But If I install LabVIEW runtime to the target PC, InTouch runtime can't find its licenses and run in Demo mode only. When I uninstall LabVIEW runtime InTouch can find licenses again and operates in normal mode. Licences for InTouch consists of files on the hard drive and software protection dongle of unknown type, connected to USB port. I have tried LabVIEW runtime versions 2012, 2012f3 and 2013, installed from standalone distributions or with distribution of application built with LabVIEW, no differences. What can be cause of conflict? What can I try to do to run InTouch runtime and LabVIEW application simultaneously?
Target OS: Windows 7 Ultimate 64-bit MUI
Host OS: Windows XP Professional 32-bit Russian

Tortu wrote:
Have you verified if this behavior is present in other computers?
No, I have only 2 PCs for tests, both new and identical in hardware and software. I'm sure I will get same result on both.
Have you tried changing the port at which you connect the USB key?
Yes.
Did you restart the computer after installing the LabVIEW RTE?
Yes.
Have you tried installing the LabVIEW RTE before installing the Wonderware software?
Yes.
Can you access other USB keys when you have the LabVIEW RTE install or does all USB communications fail?
I have another software protection dongle for InTouch. I've tried it, it doesn't work too. USB in general is working (HID, USB flash drives, USB HDD).
Have you received any troubleshooting steps from Wonderware? Please let us know.
Wonderware support engineers sent me test license file which not require USB dongle. With this license file InTouch operates in normal mode when LVRT is installed. But it is impossible to use such license in production.

Program LPC2378 with code generated by LabView ARM embedded, without using LabView

I would like to use the C files that are originally generated in LabVIEW ARM embedded module, and use Keil software (or other lower cost) to load these files into custom boards with LPC2378 controller without LabView. Are there detailed instuctions for this? I am using version 8.6 and the ARM embedded module is 1.1.
My reason for this task is boards are being made in a maufacturing facility oversees, and they need to be programmed at their end.
I read a forum describing the use of hex files, but not enough detail for me to figure this out.
Thanks in advance.

Hey Bob,
What you're looking to do should be possible. You'll just need to build the application in LabVIEW, then you should be able to use the uVisions command line to deploy the system. As for the C code itself, it gets generated when you build your build specification and you should see it placed in the same directory as your labview project in a folder named the name of your project. For example, if your project were called My ARM Project, you'll see a folder called "My ARM Project" created/updated whenever you build the build specification in that project and it will contain the C Code. To see the code organized logically, after building your build specification, right-click on the ARM target and select "Show Keil uVision". This will open a uVision window in "LabVIEW mode" and you'll be able to see all of the C files associated with you application; your VI specific code will be under a folder titled "VIs". You could also just open the C code files from disk in uVision, which is what you'll need to do if LabVIEW isn't installed. The main LabVIEW project can be found in the built directory described above as the LabVIEW.uvproj file in the "target"/Application/"uvision version"/Project directory. For example my main file was built in MyProject\EK_LM3S8962\Application\4.01\Project. From there, you'll need to follow uVision's process for compiling and deploying the target code from their command line:
Command Line
http://www.keil.com/support/man/docs/uv4/uv4_commandline.htm
Hope this helps!
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Loss serial input with re install of Labview

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