Fatal Internal Error drawmgr.cpp 2961
Hi The application which i had developed was running fine, had used the help icon, where it displays how to resolve any errors when the vi does not function bcoz of some error. Now when i run my vi it displays Fatal Internal Error Drawmgr.cpp line 2961 where i have to reboot my system. i tried removing running the Vi but still the error remains. can u hep me sort out this . Iam using Labivew 7.0 Cheers
How to modify WaveformChart history data length programmatically in LabVIEW?
How can I change waveformchart history data length in Labview during a VI's running?
Re: run ssh command in labview
Well, no one of the solutions that you gived to me seems to be what I want ... because I need to run ssh command and enter the password without the user know it ... I need an automatic process that only will be used to change the atributes of my executable file. And, to do that I need to be root ... if there's another way I don't know how ... In my case I use the object executevi and first I enter the ssh ... then I enter the password ... and in the end I enter the chmod ... but this doesn't work ... Thks for your help JP
Re: multiple simultanious measurements using daqmx
Yes,so if I've understood correctly the thing is that when you want to measure for example voltage and temperature at the same time one has to place two Create Channel vi:s on the block-diagram. One for voltage and one for temperature measurement. Then wire them together and on to whatever you want to do with the measurement data. But if you want to measure say voltage from two different channels then only one Create Channel vi is needed? And you just add the physical channels from which you want your measurements?! I'm I on the rigth track now..?
Cursor Coords
How do I obtain the cursor coords in LabVIEW 6.1 or 7.0 without using Event Structure?
Re: How to save output image after IMAQ-FFT to the file
Hallo Filip, you cannot save Complex Image to file to be readable by other programs - see link: http://digital.ni.com/public.nsf/websearch/D557B1A79C30AD5F86256AB1006A678A?OpenDocument What you can do is convert Complex Image to 8-bits BMP file format and save it then. This question was answered already - see example at: http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3ECED56A4E034080020E74861p_node=DZ52000_USp_source=External Hope this helps Pavel
How do I prioritize DMA transfers in Labview?
I am taking 40 channels of AI while simultaneously doing 3 buffered counter operations. The 40 AI channels are coming from PXI 6608's (which have plenty of onboard memory to handle the acquisitions). The problem is that the 3 counter DMA transfers are hampered by the AI channels reading the onboard memory across the PCI bus, so I get very low bandwidth on the counters. How can I define the counter DMA transfers to have priority over the AI transfers? I want the AI data to just stay in the onboard memory until the counter DMA is finished, then transfer to the PC memory buffer. That way, the PCI bandwidth is being used where it is needed. Thanks, rgames
Re: How do I write data to a new file every 24 hours?
I tried using the build file path but it keeps asking me to choose a file to write instead of writing to the file I specified with the build file path.
Re: How to modify WaveformChart history data length programmatically in LabVIEW?
I have wanted to do this a couple of times myself. This can only be changed at edit time, and it must be done via the pop-up. What problem does this cause? There may be a work-around. Ben a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=261HRedirected=TrueHUserId=101_3529RFORMNUMBER=6;Ben Rayner/a a href= http://volt.ni.com/niwc/common.jsp?page=products_certification_cldnode=10638; Certified LabVIEW Developer /a www.DSAutomation.com
Re: I am using an HP34970a and I want to measure temperatures...
Sorry you missunderstand me. I mean the attached file didn't include all your vi's in the program. You have to use Save with options-- Development distribution to be sure to include all vi's in a program when you move an application. I think you should use solution 1, configure the Agilent to check the temperature.
Re: How to modify WaveformChart history data length programmatically
How can I change waveformchart history data length in Labview during a VI's running? Since this buffer is pretty integrated into the execution of the compiled VI, it isn't possible to change it at runtime. It will automatically expand to allow new plots in the 2D array case, but the circular dimension is fixed at compile time. If you are using the waveform datatype, the buffer is measured in waveforms, which can each hold any number of points from zero to 2B. So this datatype does give you another degree of flexibility. Greg McKaskle
Problem with Run Vi Invoke Node
Hello, I have been having some trouble with the Run VI node. A button on the front panel dynamically lauches a VI. Which VI I lauch is selectable. Some of the VIs lauch right away without problem. Others require me to hit the button several times before they are lauched. I have a chain of Set Control Values before my RUN VI. There are no errors along this chain at all (not even at the end). There are no difference (that I can see...execution, opening) between the VIs that work fine and the ones that require multiple attempts. Has anyone experienced something like this before or am I special? Thanks in Advance, Glen
Re: How can I insert a C++ programm in labview 5.1;
You do not need to write a C++ program to read data from an RS-232 port. You can use the VISA Read and VISA Write functions to read and write from a serial port. If you still want to write a C++ program for some purpose, you have a couple of options. If you turn it into a shared library (e.g., a DLL), you can call it from LabVIEW with the Call Library Node function. If you just want to make an executable (e.g., a .exe), you can invoke it with the System Exec function. I hope this helps. Brian
Writing a new file every 24 hrs
I am trying to write data to a file by using the build path function. I set the base path to a constant and set the name/relative path to the current date. This should write a new file every time the date changes (at midnight of every day). Yet, when I run it, the write to file refuses to recognize the path (it shows not a path). How do I fix this?
Can I access a file while it is being written to by a different system
I am trying to read data from a file over the network. That same file is continuously being written to on a windows NT 4.0 machine by a non-labview program. For some reason I get an access violation (I am assuming this is because the file is being written to at the same time that I am trying to read it). I know for sure that this is not a file sharing issue, as I can copy files to and from the file location. Any suggestions are greatly appreciated!
I am trying to output a sine wave that increases its frequency every cycle.
am trying to output a sine wave that increases its frequency every cycle. I have the data in an excel/txt file to import. But cant seem to get labview to read this using 'simulate arbitrary signal' or 'read labview measurement file' VI's. I am using Labview 7 and will be outputting the data through a daq card.
Re: Problem with simultaneous DIO with PCI-6024E
You are correct in assuming that the port is reconfigured each time in a loop iteration when using high level VI's. One solution would be to use one port (bits 0 to 7, or Port 0) to set your output bit high. Use a different port (Port 1 or 2) to read your required inputs. If wired correctly, port 0 will always be an output and will keep your bit high while reading port 1 or 2. Using high level VI's, you will not be able to write one bit high and expect it to stay high when reading other bits on the same port.
Re: démo et diagramme de commande
Bonjour, Vous trouverez ci-dessous le lien pour t=E9l=E9charger le driver d'instrument du HP34970A (interface s=E9rie, labview 6.0). Il vous fournira les VIs de haut niveau permettant de construire votre application. Il fournit =E9galement des VI exemples Getting Started Application Exemple. http://zone.ni.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/e4c553c139f= 78062862568ab005fba3c?OpenDocument Bonne continuation. Matthieu GOURSSIES National Instruments
Re: Looks like a bug in Scan String for Tokens function...
I have LV7 and I see the same bug. I can put a blank entry (space, then backspace)into then operators array and then I get good results.
Re: I read data from RS232 port in bits format 0 1.How i can convert these inputs to useful data?
Use Serial Read function to get a string of characters from the serial port. Pass this string into the String to Byte Array function. The output of this function will be an array of bytes (numerical). You should be able to work with this (extract elements, extract bits, etc...). Of course I am assuming that Labview 5.1 has a String to Byte Array function.
Re: a doubt on stabilty of temperature measurement
Find your channel in the automation explorer where you set up your virtual channels. Select properties for the channel configured for temperature. You may specify the CJC Source select built in by using the drop down box. In the devices where your SCXI Chassis is listed, you will need to make sure you have the correct terminal block attached to the module. For the ll02 you indicated in your question you have the 1303 or the 1300, check your terminal block and make sure you have the correct one selected. This is important. For changing the resistors I recommend you read the documentation for the device to make sure you change the correct channels. Also you will find this documentation better written and pictures help illustrate the instructions. If your thermocouple is not grounded and you do have the 1303 terminal block, the factory shipped configuration will work. But it is probably best for you to set up the block as suggested for thermocouples. The 10 Mohms (10x-1-106) resistor is recommended. As I mentioned the documentation supplied with these products are a bettor source of information for some of the questions you are asking.
Re: Create a digital output and an analog input
David, you could check this example. It generates a variable frequency and duty cycle pulse train on a counter's output. http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E9F156A4E034080020E74861p_node=DZ52328p_source=External If you want to synchronize this output with an analog input capture (one point), you can wire the output of the counter to the appropiate input (AI Convert or AI Scan Start), and use one of the External Clock examples to acquire the analog sample(s). Hope this helps. Let me know if you need further help,
Re: run ssh command in labview
Unfortunetly, I don't know how to script in a password for ssh. SSH closes the stdin and re-opens the tty that you are logged in at. This is actually a security feature. As well as a way to send stdin to remote programs (otherwise your password would get in the way.) If you don't need to ssh to a remote host, and you want to chmod something on the localhost, you could use sudo instead. With sudo you can specify certain users (or all users) to run certain commands. (so you could make a shell script to chmod for you). I don't know your exact needs, but I think that a public/private keypair could still work. In your authorized keys file on your root account, you can even specify that this public key does not get shell access, and can only execute this one command. This would probably be the most secure method. But it requires the user to have the correct private key as well. If you know that won't work for some reason, then maybe you could setup a inetd process that will execute a command whenever someone connects to a certain port (then you could use LabVIEW's TCP VIs). Or, if you are not connecting remotely, you could setuid your LabVIEW executable (A VERY BAD IDEA!). Also, it is possible to script telnet. It would of course transmit your root password as plaintext, but trying to script your ssh session would also embed your password in your LabVIEW VI. Out internet toolkit for LabVIEW has some helpful telnet VIs. May I ask why you want to chmod something on a remote system that requires root? Sounds like maybe you should create a LabVIEW application on the remote side that acts as a daemon (running as root) and accepts connections and commands and does the chmodding for you. -Duffey
Re: AT command CDMA LG phone diagnostic mode labview, after t
Hello - It appears that your question actually has to do with your LG phone and not LabVIEW. Do you have a manual you can refer to for interpretation of codes? Good luck with your project. Have a great day! Becky B. Applications Engineer National Instruments
Re: help debugging an internet toolkit/telnet program
Hi Ben, thanks for the input. Unfortunately it isn't the 'byte written 2', it isn't the ASCII situation, and I have no LED to indicate that the password worked correctly and logged me on. The only thing I have is an led letting me know that there is information being sent to the unit remotely. If there is any other suggestions you have they would be appreciated. Thanks again. Bryan
Re: Control the LPT voltage
Reiss, Here is a super brief definition of TTL: a href=http://zone.ni.com/devzone/nidzgloss.nsf/webmain/D4A5C0CDFB870D518625686A0079445A?OpenDocumentnode=DZ59452_USBrief Definition of TTL/a. For a more involved definition try this link: a href=http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/acb4bd7550c4374c86256bfb0067a4bd?OpenDocumentDefinition of a TTL Compatible Signal/a. Please post back with any other questions. Craig H. National Instruments
Re: Publication Quality Image Files [.TIFFs] of Waveform Graphs or Waveform Charts?
nbsp; Okay, I installed the HP PostScript drivers, but, as far as I can tell, there is no option to 'Save to File.' [Such an option may be there somewhere, but I looked all over the place, and I couldn't find it...] Besides, the idea of saving to PostScript, and then running some program like 'ps2png' or 'ps2tiff' is not very appealing to me, for at least two reasons: 1) It's very batch-file-ish in nature, i.e. I've got to download some monstrosity like Ghostscript, get it installed, get it configured [no trivial task in and of itself, believe you me], then write some batch-file-ish thingamabob to open the PostScript file and process it - I'd much prefer to [at the very worst] make a call straight to a DLL from within a Labview VI. But that's only the start of my woes; once I've got a PostScript file, I've got to figure out some way to cut just the picture of the Waveform Graph from the larger picture of the VI window - I suppose I could use some sort of a Clipping Path or an Encapsulated PostScript Bounding Box, but at this point we've clearly crossed over into the realm of what I would call 'hideously ugly, grotesquely inelegant, batch-file-ish hack.' Plus, my gut instinct is that it would take a bare minimum of a week or more to get such a thing up and running efficiently, when, if I could make a call straight to the Labview printing infrastructure, I could do it in just a few minutes. 2) It's very, very difficult to venture into the realm of PostScript software [especially Ghostscript] and keep your project from becoming contaminated by the GPL, or worse [the Aladdin license agreement ain't exactly a stroll on the beach]. nbsp;
Re: Writing a new file every 24 hrs
Attach your code. You have some kind of error in building your pathname.
Re: New Control Labels are bolded
It worked! Thanks for your help. Tried everything else in the Font options but this.
Re: New Control Labels are bolded
ToolsOptionsFonts are all use defaults. Changed this for application font and it changed the VALUE part of the control but not the label. Changed it back no effect and it still bolds the labels Appearance settings are the same as another windows 2000 system which does not bold label when controls are placed on front panel. Any other ideas?
How can I take the data every 3 s?
What can I do if I would like to take data every 3s when the data are generated continuously? Can you give me an example?(version6.1) Thanks
Equipment simulation in NI Explorer for Labview CVI
What is the easiest way to simulate an instrument? I want to fix an app on a pc that is not hooked up to the actual instrument - can I just use the existing driver to simulate actual instrument behavior. Any suggestions or examples?
Re: Urgent! Web browser ActiveX control size messed up.
Hello inhaler, Thank you for your question regarding ActiveX controls. You mentioned that the size of an ActiveX web browser control is not correct when viewed on another machine. It sounds like the application was installed with 800x600 resolution and even after changing the resolution to 1024x768, the size of the control is still too large. I tried to recreate the problem by building an executable in LV 7 (Windows XP, IE6) with an ActiveX web browser control and then run the executable on a Windows 98SE (IE5) machine with 800x600 resolution. The browser was large but this was expected with this resolution setting. After changing the resolution to 1024x768 the browser window seems to be sized the same as the window on the XP machine. In short I wasn=92t able to recreate the problem you=92re having. Could you provide a simplified executable that demonstrates the issue and attach it in a response? I have access to a 98 machine so that I can test the problem that you=92ve encountered. I look forward to hearing from you! Regards, Shea C. Applications Engineering
Re: UDP address!
Check out the shipping example UDP Sender.vi. It can be found in \examples\comm\udp.llb or search the help for udp. Basically it uses the string to ip function so you can input your IP in XXX.XXX.XXX.XXX format Tim
Re: pass complex array into matlab scrip
The matlab script node does not take complex numbers. You might try passing two real arrays into the node--one for the real component and one for the complex component. Once inside you can try to merge the arrays or just use the information separatly. I do not have matlab so I cannot offer example code.
Re: VISA Find resource VI and TCPIP devices
This is expected behavior, at least to me. VISA Find Resource returns the resource because you manually configured it locally. You really don't want VISA doing a lot of unnecessary ethernet traffic at that point in time, just to see if it's really there. Obviously, though, NI-VISA doesn't follow this behavior for local bus types, because the latency is much much smaller. So I do understand why you may see this as inconsistent. What you may want to consider is writing a small sub-VI that wraps VISA Find Resource, VISA Open, and if necessary, VISA Close. Then you can filter out the ones that you can't access. Dan Mondrik National Instruments
Re: a doubt on stabilty of temperature measurement
I checked my document, and now I have some idea about it. Also I check the connection, the miniconnectors for SCXI-1112 are right, and I have not use connectors for SCXI-1303. In the SCXI-1303, all the sockets are filled with the 10Mohms resistors. And there is not grounding wires. All the above seems ok, right? what should I do is specify the CJC source to 'build in'. Hopefully, it will work well. Thanks Wu
Re: a doubt on stabilty of temperature measurement
I am sorry. I found all the bias resistor are 10ohms, when I checked SCXI-1303 again. So should I Change all the four bias resistor network, or just change the need one. Now I am using channel 0-7 to measure temperature and microvolt. Can I just change the network in RP1( For channel 0-7)? If so, when I change the setting, should I use other channels(8-31) to measure microvolt? Thanks
Re: How to modify WaveformChart history data length programmatically
any number of points from zero to 2B Is that 2b hex or to be determined or a typo? I never noticed an upper limit. Is there one? Ben
Re: Invoking the Tools-Compare VI's functionality from my LV program
Compare VIs is a VI. You should be able to find it in .\labview\project\procmpheir.llb. I did not check to see what was password protected. You will not be able to get the passwords from NI, but you might be able to use the subVIs.
Re: Cursor Coords
Hmm... I wonder why you do not want to use event structure (as it's available for both those versions), but, anyway, there is a couple of other possible solutions: 1) Overlaing interested area with a transparent picture control - this allows you to use its mouse property (but, this approach imposes a number of limitations); 2) using a call to appropriate system utilities via dll (i.e. using call library function node)
Re: Publication Quality Image Files [.TIFFs] of Waveform Graphs or Waveform Charts?
Greg McKaskle provided another way. See this link: http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=135HOID=5065000800F7C5USEARCHCONTEXT_CATEGORY_0=_49_%24_6_USEARCHCONTEXT_CATEGORY_S=0UCATEGORY_0=_49_%24_6_UCATEGORY_S=0 EMF should be better than raster image file format (such as BMP, PNG, TIFF, etc). Invoke Node/Get Image uses raster format. The highest resolution is the screen resolution. While the print subroutine probably using vector format. George Zou http://gtoolbox.yeah.net
Re: Why does one while loop stop after 3-4 weeks?
Hi Richard, As a quick test to rule out the following, could you pull the serial cable being used by this loop? Just pull it and verify this loop does not hang. If it does hang post and I will explain my theory. Its not worth troubling you with the details without knowing the answer to the above. Trying to help, Ben
setting up differential and single ended connections, multichannel scanning also
i am currently using the PCI6014 i have set up the 8 input digital channel, three differential channels and one NRSE channel. I would like to know how to scan from the three differential channels as well as set them up. Also since i am using a NRSE does it mean that i connect AISENSE to AIGND? Channel 0 is used as the NRSE channel and 19,210,311 is used as the differential input.
Re: I get internal error 2349!
I wasn't able to find any specific information about that particular error code. Often times errors during installations sometimes due to previous uninstallations that did not execute properly. That may or may not be the case with you. There are some alternatives you could try to get the NI-SWITCH software installed, but if you're not actually using any hardware that requires NI-SWITCH, you might just not install it at all. I'm only assuming this might be the case with you because I believe the installer automatically installs it by default no matter what hardware you have. Look at the a href=http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/1a578095a37aae8386256dd500782470?OpenDocument;NI-SWITCH download page/a for a list of products that require NI-SWITCH. If your hardware isn't listed, choose custom installation the next time you try the installer and deselect NI-SWITCH so the installer does not try to install it. Now, if your hardware really does need the NI-SWITCH software, try deselecting it anyway. Download and install NI-SWITCH separately from the link above and see if that changes things. I hope this helps! Russell Applications Engineer National Instruments http://www.ni.com/support
while loop causing problems with sent commands?
For some reason the commands sent to my instrument, an intellegent power control unit, are not responding properly. The commands are definitely recieved (I can tell by an led light that flashes everytime info is received) so I know the connection is there. My question is could it be the while loop that is messing it up or maybe it needs some carriage return? The commands are usually sent through telnet and are very picky about what it will accept IE if you put a space before or after the command after entering it, it will not work, and if you enter the command and hit backspace at all it won't work. Does anyone have any suggestions?
Re: Displaying a custom graph
Joe, I was wondering if you recieved any of my previous comments about my problems. I will periodically check back. Matt
Re: not able to type into string control
Yes! Check to make sure the control is not disabled! pop-upAdvancedEnabled States Enabled I believe it was Dennis that helped me out that day. Ben a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=261HRedirected=TrueHUserId=101_3529RFORMNUMBER=6;Ben Rayner/a a href= http://volt.ni.com/niwc/common.jsp?page=products_certification_cldnode=10638; Certified LabVIEW Developer /a www.DSAutomation.com
Re: Looks like a bug in Scan String for Tokens function...
Ok, so this bug is still there... Anyway, this one is not a simple one to find out, so no wonder that it rests unnoticed.
Re: not able to type into string control
It is enabled. Thanks for the suggestion though.
Re: not able to type into string control
Right click on the control and make sure the third line is Change to Indicator. Is the control included in the connector of the vi? If it is, at run time you would not be able to change the value. sdzg'lkmarekngroe [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I have a couple string controls on my front panel. I can not type text into the controls when the application is running. I have looked at all of the front panel settings as well as the string control settings. I've never had this happen before. Does any one have any suggestions?
Re: Generate Report From Template (Excel).vi don't understand to fill the cells
You can get the answer to your question by reading the following thread: http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=137HOID=506500050019360100HTHREAD=7938579477794987954279632UCATEGORY_0=_49_%24_6_UCATEGORY_S=0 The short answer: To setup or modify the Named Labels in your Excel template, use Excel's Insert - Name - Define command. A name can be defined as a single cell or a block of cells. Michael Munroe Certified LabVIEW Developer www.abcdefirm.com
Re: Why does one while loop stop after 3-4 weeks?
No, the loop doesn't hang if the cable is unplugged. The Error LED comes on, but the other loops continue. When the cable is plugged back in again, that loop starts communicating again. Rich
Re: Sorting 1d array of alphanumeric strings
Read the numeric value out of the string as a number, create an array of clusters of number, filename. Sort the array (clusters are sorted by sorting the first element first, and if there's a match, breaking the tie based on comparing second element, then third element, etc). After sorting, pull the filenames out of the array. Pojundery, Stephen R. Mercer -= LabVIEW RD =- |-+ | | Kalyanramu | | | Vemishetty | | | [EMAIL PROTECTED]| | | Sent by: | | | [EMAIL PROTECTED]| | | a.army.mil | | || | || | | 03/11/2004 11:05 | | | AM | |-+ --| | | | To: [EMAIL PROTECTED] | | cc: | | Subject: Sorting 1d array of alphanumeric strings | --| Hi all, I am working on an application which involves sorting of filenames. The problem I am facing is that, If I have filenames such as data1.dat data3.dat data11.dat data2.dat data12.dat Then using the sorting of sortings, I get data1.dat, data11.dat,data12.dat,data2.dat,data3.dat. But the result I want is data1.dat,data2.dat,data3.dat,data11.dat,data12.dat. I undertand why I get the result(because we are comparing strings. But inorder to get the result as I want what should I do. What would be the quickfix for this problem in LabVIEW. Any help would be appreciated. Thanks, Kalyan
Alternative info-LabVIEW list
Well, I decided to put up an alternative Info-LabVIEW mailing list. Since it is a fact that many people refuse to use web based forums, I think a mailing list is still essential. Right now, the original list is up and down. Here is the link to the new subscription page. http://lavausergroup.org/mailman/listinfo/info-labview_lavausergroup.org I'm not trying to bully my way into anything. I just want to help the community. Feel free to sign-up and send messages. Time will tell of what will happen to the original info-labview list. In the meantime let's move on. If the original ever gets revived then I will shut-down my list. Thank You Michael Aivaliotis
Re: DAQ Time Chart
Hello AeroDesign, Sorry for the delayed response. I had to refresh my memory on some of the data types you were using. The problem that you are having is becasue the data comming from the AI Read.vi is waveform data and has a system time attached to each data point. You can strip the data points of this system time by using the Convert from Dynamic Data function and selecting 1D array of scalars from the pop-up window. This will create an array of your data that will display on the chart without reverting the x-scale to system time. I hope this helps you out! Let me know how this works. You can find this function by searching in the functions palette for Dynamic Data. Regards, Shea C. Applications Engineering
Re: New Control Labels are bolded
It worked! Thanks for your help. Tried everything else in the Font options but this. I'm coming in on this late, but I'd guess that what was actually changed was the Current Font definition. If you select something and change the font, you apply it to the selection. If nothing in selected, you are changing the font specification that will affect things that adapt the current font, like free labels and the name labels of controls. So, if you have nothing selected and you go to the menus and choose Bold, subsequent free labels and name labels will drop bolded. Ditto for making the font be Sand or some such. To put it back, have nothing selected and choose App font or uncheck the other setting. Greg McKaskle
Re: How to modify WaveformChart history data length programmatically
any number of points from zero to 2B Is that 2b hex or to be determined or a typo? 2B is my shorthand for ~2 Billion, or 2^31 - 1. This is effectively the upper limit on LV arrays since they use a signed I32 to store their size for each dimension. And of course we are already having to look forward to the day that we bump this to a 64 bit number. Joy, joy. Greg McKaskle
Re: Event Structure recognises clicks on diasbled buttons
Hi, In LabVIEW 7.0, mouse up event is still queued on the event structure even if the button is disabled. This is expected behavior. The rational for the mouse up event is you can still want to know that you have a mouse up event even if the control is disabled. All disabling should do is not allow you to do a value change. On the other hand, the value changed event should check to see if the button is disabled, but not the mouse up event. Feroz National Instruments
Re: Displaying a custom graph
Matt- Thanks for getting back with me. I hope your vacation was relaxing. Things have been a bit hectic in the office this past week, but I did look further into your questions and have come up with the following: First, I understand you wish to change the order in which the data is plotted on the waveform graph. The only way to do this is to re-route the order of the data signals into the build array function that pipes into the waveform graph indicator on your block diagram. The first (top) data signal into the =93Build Array=94 function is programmatically placed into the first column of the array. By default, this first column of data is plotted as the top signal in the plot legend of the waveform on your front panel. This brings me into a solution for your second problem. In your screen shot, I noticed that your top (white) line is expected to be the max power plot. I could not see your blue data point plot on the output waveform, but I think that this plot is actually your max. power plot (according to the max power signal being appended to the bottom of the array in your block diagram). One thing you may want to try is swapping the wires that enter your final =93Merge Signals=94 function on the block diagram. Doing so should place the max. power plot as the top signal in the plot legend, and you can track it on the diagram accordingly. Make sure that the max power data point representation is different than the other signals, because two circle data points will appear as a single data point on your graph (hiding important data). Finally, I have one piece of advice that may solve your problem with the =91freezes.=92 Try adding a =93Wait (ms)=94 function into your While lo= op. This will cause your program to allow system resources for other processes such as mouse movements or window movements that, with your current program arrangement, will not occur upon demand. To add the =93Wait (ms)=94 function, [right-click] your block diagram and select [All Functions][Time Dialog][Wait (ms)]. I hope this helps you sort everything out. Please let me know if you need any further assistance. Good Luck! Joe Des Rosier National Instruments
How to close certain subvi front panel?
Hi, i have a program with many subVIs and they open at different situation. I need them to be open until i click a button in my mainVI. The mainVI button is suppose to reset and close the subVI FP. Is there a simple way to do it because i have many subVIs? I tried close FP method but the problem with that is if my subVI is not open... clicking the button will hang the program.
Can I use LabView Run-Time Engine on Windows XP?
An Application uses LV Run-Time Engine 5.1, i want to use this application on windows XP, can i use the same version of the RTE, if not, what is the solution??
Re: Invoking the Tools-Compare VI's functionality from my LV program
Thanks Jeremy. This llb included the 'Compare VI Hierarchy' Window but I am particularly interested in the 'Compare VI' window. I couldn't find that in this llb. Please let me know if you know where I can find that.
run a executable created in Matlab
Can I create a executable in matlab and use it in labview? What if the executable takes in input and outputs data. Can labview handle that?
