Signal Express 2009 causing NIMAX to generate an Error Exception message

I have a system that gives an error message when I try to open an instrument in NIMAX. The popup error message says "unexpected Error", with a code of "MAXKnownException. This system is running Windows XP and we had Signal Express 3.0 with NIMAX 4.3 running perfectly. We upgraded to Signal Express 2009 with NIMAX 4.6 and this problem occurs.
The error log message that is gereated is
"The niVISAui.mxx plug-in caused an exception in the CmxAggregateItemUI::GetToolbar function in the NIMax process."
Thanks
Solved!
Go to Solution.

Hello,
I am getting the same message stating "Measurement and Automation Explorer encountered an unexpected error since it was last run. For more information, visit ni.com/info and enter the Info Code MAXKnownException." I did so and matched all the known exceptions but could not really find anything useful.
I am using MAX version 4.7 have LabVIEW 2010 and the latest verion of NI-DAQ installed as well. I am using this on Windows XP OS.
I have also attached the error message screenshot in this post (Error1.jpg).
In addition I have also added the error messages which I received on continuing to open the MAX nonetheless and then opening Devices and Interfaces and the error on trying to work through using LabVIEW Signal Express for DAQ. (Error.jpg)
Could you please let me know what this might be about and how can I resolve the errors?
Thanks,
Rohit Parakh
Attachments:
Error.JPG ‏31 KB
Error1.JPG ‏42 KB

Similar Messages

Signal Express Large TDMS File Recording Error

Hello,
I have the following application and I am looking for some tips on the best way to approach the problem with Signal Express:
I am attempting to using Signal Express 2009 (Sound and Vibration Assistant) to collect random vibration data on three channels over an extended period of time -- about 20 hours total. My sample rate is 2kHz. Sampling at that rate over that period of time invovles the creation of a very large TDMS file, which is intended for various types of analysis in signal express later or some other application later on. One of the analysis functions to be done is a PSD (Power Spectral Density) plot to determine the vibration levels distributed over a band of frequencies during the log.
My original solution was to collect a single large TDMS file. I did this with Signal Express recording options configured to save and restart "in current log" after 1 hour worth of data is collected. I configured it this way because if there is a crash/sudden loss of power during data collection, I wanted to ensure that only up to an hours worth of data would be lost. I tested this option and the integrity of the file after a crash by killing the SignalExpress process in the middle of recording the large TDMS file (after a few save log file conditions had been met). Unfortunately, when I restart signal express and try to load the log file data in playback mode an error indicating "TDMS Data Corrupt" (or similiar) is displayed. My TDMS file is large, so it obviously contains some data; however, Signal Express does not index its time and I can not view the data within the file. The .tdms_index file is also present but the meta data.txt file is not generated. Is there any way to insure that I will have at least partially valid data that can be processed from a single TDMS file in the event of a crash during mid-logging? I don't have too much experience dealing with random vibration data, so are there any tips for generating vibration level PSD curves for large files over such a long time length?
My solution to this problem thusfar has been to log the data to seperate .TDMS files, about an hour in length each. This should result in about 20 files in my final application. Since I want to take a PSD, which ends up being a statistical average over the whole time period. I plan on generating a curve for each of these files and averaging all 20 of them together to get the overall vibration PSD curve for the 20 hour time period.

JMat,
Based on the description of your application, I would recommend writing the data to a "new log" every hour (or more often). Based on some of my testing, if you use "current log" and S&V Assistant crashes, the entire TDMS file will be corrupted. This seems consistent with what you're seeing.
It would be good if you could clarify why you're hoping to use "current log" instead of "new log". I'll assume an answer so I can provide a few more details in this response. I assume it's because you want to be able to perform the PSD over the entire logged file (all 20 hours). And the easiest way to do that is if all 20 hours are recorded in a continuous file. If this is the case, then we can still help you accomplish the desired outcome, but also ensure that you don't lose data if the system crashes at some point during the monitoring.
If you use "new log" for your logging configuration, you'll end up having 20 TDMS files when the run is complete. If the system crashes, any files that are already done writing will not be corrupted (I tested this). All you need to do is concatenate the files to make a single one. If this would work for you, we can talk about various solutions we can provide to accomplish this task. Let me know.
Now there is one thing I want to bring to your attention about logging multiple files from SignalExpress, whether you use "current log' or "new log". The Windows OS is not deterministic. Meaning that it cannot guarantee how long it takes for an operation to complete. For your particular application, this basically means that between log files there will be some short gap in time that the data is not being saved to disk. Based on my testing, it looks like this time could be between 1-3 seconds. This time depends heavily on how many other applications Windows has running at the same time.
So when you concatenate the signals, you can choose to concatenate them "absolutely", meaning there will be a 1-3 second gap between the different waveforms recorded. Or you can concatenate them to assume there is no time gap between logs, resulting in a pseudo-continuous waveform (it looks continuous to you and the analysis routine).
If neither of these options are suitable, let me know.
Thanks, Jared

Signal Express project document questions

Hi,
I'm using Signal Express 2009 to log two current signals(4-20mA) from a NI9219 card mounted on cDAQ9172 chassis.
Signal #1 on NI9219 channel ai1 is a pressure signal, scaled unit for this signal is PSIA
Signal #2 on NI9219 channel ai2 is a differential pressure signal, scaled unit for this signal is inch.water
I have no trouble to view the signals on Data View, both are displayed with the correct value with correct engineering unit shown on Y-axis.
But when I display the two signals in Project Document, wierd thing happened: signal #1 is displayed in correct value but in inch.water; while signal #2 is displayed in correct value but in PSIA.
Anybody knows what went wrong?
Attachments:
Flow_TEST_PR4000.seproj ‏343 KB

Hey bon2b,
When I opened your file, The inlet pressure is in psia and the differential pressure is in inches of water in the project documentation. From what I understand, that is what you wanted. Is that correct? If so you might just need to close and reopen it. Are you talking about the compound graph in the project documentation? I dont see any graphs of individual data, so for the compound graphs, both scales are present on the y-axis.
Luke

I am trying to use generate code in signal express to import into labview.

I get this error when i try to generate code in signal express to export to labview . I have tries the error suggestions but I am still having problems. any help would be appreciated
The version of LabVIEW you are generating code into does not contain all the necessary SignalExpress support files. Make sure you launch the version of LabVIEW with SignalExpress support installed before generating code from SignalExpress. If you want to generate code into more than one version of LabVIEW, uninstall SignalExpress and all versions of LabVIEW except the earliest. Install SignalExpress, then install any other versions of LabVIEW. Copy the files from the vi.lib\express\SignalExpress directory of the earliest installed version of LabVIEW into the same sub-directory location of any other version of LabVIEW in which you want to include support for code generation.

Typically, this problem is repaired by following the directions on the error message. Since it was not, can you please give us more information so we can start determining the cause?
What version or versions of LabVIEW do you have installed? What version or versions of SignalExpress do you have installed? Could you post a file with a listing of the files in <vi.lib>\express\SignalExpress for the version of LabVIEW you are trying to use. You can either post a screenshot (in PNG or GIF format) of the directory dialog or use the command prompt to generate a list to a file (preferred). To generate a list with the command prompt, do the following:
Launch the command prompt from the start menu — Start»Programs»Accessories»Command Prompt
Navigate to the drive you have LabVIEW installed on ( usually C: ) — C:
Change directory to the appropriate LabVIEW directory — cd "\Program Files\National Instruments\LabVIEW 8.2\vi.lib\express\SignalExpress". Change the LabVIEW version to the one you actually are using. Do a directory listing and redirect the output to a file — dir > filename.txt. You can use any full path for the filename.txt. If you specify a simple name, it will end up in the current directory.
Please post your project. Verify that you are using the version of LabVIEW you think you are by launching it before you start code generation.
Thanks for your patience.
Message Edited by DFGray on 08-28-2008 08:23 AM
Message Edited by DFGray on 08-28-2008 08:24 AM
This account is no longer active. Contact ShadesOfGray for current posts and information.

How can i generate AMI line codes in LabView signal express?

i wish to conduct a project that uses AMI line codes. but i have a hard time using signal express to generate it. can anyone help me with that?

Hello Barry,
That is really a problem, in LabVIEW, we can only convert vi to the previous version, I have version 7.1 and so I can only convert to version 7.0 and you cannot open this too.
But I think that it's very easy to do what I'm trying to explain you.
Go to the cluster group in the functions pallete. Place an unbundle by name function in the diagram and connect it to the data that's comming out of the FFT Power spectrum vi - the pink (or watever) wire.
Click in the white part of it (it should contain something like f0), choose magnitude.
This is now an array that you can connect to the peak detector function.
Take care about the threshold and width parameters of the peak detector.
Take a look at your signal and decide the amplitude and width of the peaks you want to detect. The threshold is the amplitude above what you consider as a peak, the width is a little bit more complicated - to begin, 3 or 4 should be a good number if you signal is not too noisy - bigger widths will somehow do a kind of a low pass filtering to your signal.
The position output of your peak detector is an array of locations where your peaks were found.
Keep in mind you are now working in frequency domain and that position means something in the frequency domain.
The array you placed as input of the peak detector is an array of points starting in f0 and separated by df (the other elements of the cluster).
So to calculate the real value of the peaks, you have to multiply them by df and add them f0.
Sorry by the big text and sorry if I went too much in detail,
Hope it helps,
Paulo

Generating PWM signal using Signal Express

Hi,
Would anyone help in generating PWM signal usinf Signal Express 2.5.1. I am using a cDAQmx and connected NI 9472 to the slot number 6 to output the PWM signal. Also I have connected a NI 9421 to the slot number 5 to acquire the PWM signal, so that I could verify the signal.
So would you please let me know how could I generate a PWM signal using Signal Express without any LabVIEW Programming. Please help me out.

HI Aamruth,
I atached a project, where you can see how to do it. I hope this helps.
Regards, Mona
Attachments:
PWM.seproj ‏29 KB

Signal Express not activated with Labview Full Development System Volume License

I'm using a volume license manager to generate license for disconnected machines. I just upgraded to Labview 2009. The license files work for labview but are not working for signal express. I have the Labview full development system which included signal express in the past. Both labview and signal express work fine on my computer that also has the volume licensing manager software installed. This computer is connected to the license server. I need to get signal express activated on my disconnected machines.

LabVIEW Full Development licenses still include Signal Express. Are you saying that whenever you are connected to the server you can run Signal Express just fine, but whenever you create a disconnected license Signal Express is not able to launch? Can you verify that you are, in fact, checking a license out from the server whenever you are connected to the network?
If you still have trouble I would recommend calling NI support so we could get more informatioin (such as your license file, contract ID, etc).

Please outline structure of custom Bodeplotter in Signal Express somebody!!!

Hi measuring Bode diagram of low-quality DC-motors is hard (voltage in -angle out) because
the "zero"-position is drifting away.
This is due to unwanted offset in the signalgenerator and/or nonlinearities in
the DC-motor.
I've done a vi that detects a dc-offset in a signal and generates a "counter" DC-offset to compensate for it.
Now I need to use signal express to generate x number of signals consecutively, with increasing frequency, specified by the user,
While outputting each signal, it should be possible to add the counter-DC-offset.
When DC-drift is compensated, that is no DC component from the rotorangle-measuring-transducer,
SignalExpress should calculate and plot corresponding gain and phase shift in a Bodediagram.
This should repeat itself until all frequencies are measured are run and gain and phase shift is plotted in the same single diagram
Kindest regards,
laskar01

Hello OKors,
For future reference, you can check the version of NI-DAQmx installed through Measurement & Automation Explorer (MAX).
Start»Programs»National Instruments»Measurement & Automation
With MAX open, you can expand the Software section to see all NI Software installed and their respective versions.
You are correct that this process is somewhat of a table-based physical calibration. We have not yet implemented the same Offset Null and Gain adjust type of calibration that you would find with the Strain task. The calibration process available with the Custom Voltage with Excitation task is designed to interpolate between calibration data points. Thus, you must provide at least two calibration points. Your first calibration point could be zero (unloaded). Use zero as your first reference point. Provide a second data point to obtain a y = mx + b interpolation. Apply a known load to your load cell and use this as the second reference point.
An alternative would be to simply take a measurement from your unloaded Load Cell and apply this to your Custom Scale. You should be using a Custom Scale anyway since you don't want Volts but Lbs right? In the scaling parameters of the Custom Scale, the Slope should be your load cell sensitivity (lbs/V) and the Y-intercept can be your offset.
Message Edited by RT4CY on 09-18-2009 01:57 PM
Rod T.

Report generation toolkit and signal express user step : problem of closing reference in "Stop" event

Hi all,
I'm trying to make a package of Vis to easily make Excel reports with Signal Express. I'm working on LabVIEW 8.2.1.
I'm using the report generation toolkit, so I build a .llb from my project which contains all the hierarchy of my steps, but also the hierarchy of dynamic VIs called.
I have made some steps, like "Open Workbook", "Write Data", etc.
My steps run well, excepts one step : "Close Workbook".
If my "Close Workbook" step is firing on "Run" Signal Express event, I have no error, so my reference is properly closed.
But if my "Close Workbook" step is firing on "Stop" Signal Express event, I have an error "1", from "Generate Report Objectrepository.vi".
I feel that I'm trying to use a reference which has been killed in the "Stop" step...
I would like to know what exactly do Signal Express on "Stop" event and why my close function does'nt run well.
Thanks,
Callahan

Hi Callahan,
SignalExpress (SE for short) does the following on the Stop event:
1. Takes the list of parameters that SE found on your VI's connector pane, and sets the values that the user set from the "Run LabVIEW VI" configuration page, if any.
2. Then tells the VI that SE is running the Stop event by setting the Enum found on your VI's front panel. This in turn should produce some boolean values telling your VI to execute the Stop case.
3. The VI is then run, with those values and states.
4. SE checks to see if any errors where returned.
5. Since this is the Stop event, SE releases the reference to the VI which it possesses.
Questions for you would be, is the reference to your Workbook linked to a control on your connector pane, or held in a uninitialized Shift Register. If it's held in a Shift Register, SE would not be aware of it, and would not be able to affect that reference.
Hope that helps. Feel free to post your LLB if it doesn't.
Phil

Using Signal Express VI for DAQmx, timing & file size issues

I am using a Signal Express VI with my DAQmx. Long story short, my DAQmx VI's don't work in LV 8.6 (possibly IT installation error). I have a few issues (I'm a beginner so be easy).
First, I'm confused on how to get the timing correct. I am trying to read a 100 samples (2 channels) average them and repeat this at 30Hz and record this data.
Second, everytime I open the Signal Express VI (in my block diagram) and change sampling for example, click OK, then save my VI before running my program. I noticed the file on disk increased in size by the megabytes! All I changed were the sampling settings.
I appreciate any input, thanks in advance!
-Michal
Attachments:
Philtec_09-22-09.vi ‏2589 KB

To your first concern, it sounds like DAQmx was installed before LabVIEW. Just reinstall DAQmx and it will work fine in LabVIEW.
For you second concern. To get 100 Samples at 30 Hz, you will need to change your channel setup in signal express. You will need Continuous Aquisition, with 100 Samples to Read at 3000 Hz. Then you code should work as expected.
Chris Bakker
National Instruments
Applications Engineer
Check out LabVIEW 2009 and the New X-series DAQ!

LEGO Mindstorms 2.0 crashes at startup when LabView Signal Express is installed first

When NI Circuit Design Suite Education Edition is installed first in a computer and the LEGO Mindstorms software second, the LEGO Mindstorms software doesn't work, it reports the following:
Error: A required file is broken
Possible Solutions: Reinstall the LEGO Mindstorms NXT Driver (tried but doesn't work)
Error code: 1003
Ordinal not found
The ordinal 18 could not be located in the dynamic link library NIVISV32.dll
Error loading "fantom.dll"
The operating system can not run %1
On other computers the LEGO software starts running, it displays part of the initial screen and then a small window opens saying that the Mindstorms software has has an error and that it will close. The previous report doesn't show.
If LabView Signal Express is uninstalled and then the LEGO software reinstalled, the LEGO software works.
I've dowloaded and installed new and old versions of the NIVISV32.dll and this doesn't correct the problem. I went as far as version 4.20 of the dll because it is dated in 2007 and the dll file installed by the LEGO software when it works is also dated 2007, but if I install the dll without uninstalling LabView Signal Express, the LEGO software continues not working.
Please advice how to correct this problem without having to uninstall LabView Signal Express first. If the LEGO software is installed first, is LabView Signal Express going to use and not to replace the old 2007 version of the dll installed by the LEGO software? Is there any LEGO software update that corrects this problem?
I repeat: I know a solution is to uninstall LabView Signal Express, install LEGO Mindstorms and then reinstall LabView Signal Express but I have 60 computers already cloned and deployed with this problem, so I don't want to go to this long process to fix the problem. The computers are using Windows 7 and problems happen on both the 32 and 64 bits versions of Windows 7.
Any ideas???
Solved!
Go to Solution.

I couldn't reproduce the error either, but in our x86 computers this problem appeared after several months; we used LEGO Mindstorms last time in Summer 2011 without any problems and just three weeks ago when we were checking the computer for our Summer 2012 classes if when we noticed the problem. I’m still going to try to reproduce the error in an x64 computer where the problem appeared immediately.
Anyway, I’m attaching a word file with images of captured screens where you can see the error reports generated by LEGO Mindstorms and a series of steps uninstalling and reinstalling these program plus LabVIEW, until LEGO Mindstorms finally works after having uninstalled all traces of LabVIEW.
Images can be expanded and zoomed in to a better view of the details and if I can reproduce the problem in an x64 computer I’ll let you know.
Please see if you can find out something based on the images I’m sending.
Thank you.
Attachments:
LEGO PROBLEM.doc ‏3129 KB

Signal express log import

Dear group,
Can Signal express load tmds files created from wav recordings? I gave it a try but the file import didn't work for me. I browserd through the examples which worked fine. I tried converting the files to tdms via Diadem, but still no luck with imports. Any tips are appreciated, Thank you.

Hi monotone,
Can you give me more information about the TDMS file? Where was it generated? Do you have LabVIEW also?
If you have DIAdem questions you can post questions on the DIAdem discussion forum.
Regards,
Ima
Applications Engineer
National Instruments
LabVIEW Introduction Course - Six Hours
Getting Started with NI-DAQmx

X-Plot Channel 1 vs. Channel 0 in Signal Express

Hello All! This is probably obvious, but I have not been able to find it. I am trying to use signal express to record 2 differential analog imputs in a DAQ device (NIDaqMX). I have differential Channel 0 and differential Channel 1. I can record channel 0 vs. time and 1 vs. time, but I need to be able to generate a Channel 1 vs Channel 0 plot. Is there a way to do this in Signal Express?
Your help will be greatly appreciated.
Thanks in advance,
Diego J. Diaz

Hello Phil, Rob, All;
Thanks for your replies. I will give a bit of background of what I am trying to accomplish. We have an old piece of electrochemical instrumentation (potentiostat) that used to collect data to an X-Y recorder. It sends an analog (up to) -10 to 10 V signal on an X channel and another one on an Y channel. We can use knobs in the instrument to "scale" the signal (or in LabView or Excel). Now, the X-Y recorder is gone to the old instrumentation heaven and I am trying to use and USB-6008 or USB-6009 (I have both) to collect data. X-axis is the voltage to which I assign channel #0 and the current is assigned to channel 1. Now, I can collect different "waveforms". It is usually a linear ramp (low-high-low) in cycles or steps (low to high to low asd a staircase instead of a ramp). I can collect either channel separately, but can't plot current vs potential (1 vs 0). I can do current vs time or potential vs time.
Thanks for all the help. Hope this bit of background can help in finding a solution.
Diego J. Diaz

NI Labview Signal Express activation dont work

Actually, signal express was working properly. We tried to run the upgradation cd on 4 Jan, 2010 that was provided by NI in august 2009. It was taking unexpectedly longer time and we turminated running the setup before completion. When we start signal express a window appeares that ask for activation (see attachment). Even after activating properly, same window appears time and again. We are unable to start signal express, please do the needfull.
Attachments:
Activation window.doc ‏130 KB

Hello,
Sounds like aborting that installation may have corrupted your software. I would try to repair Signal Express with the original disks that you had and see if that works ok before trying to install the upgrade again. You can repair NI software by going to Add/Remove programs, find National Instruments Software and click Change/Remove. This brings up a window where you can select Signal Express and click the repair button. It will probably ask you for the CDs that you installed from ( the original CDs). Let us know how this goes, if you have problems or questions we will try to help.
Thanks,
National Instruments

Why the acquisition with DAQmx is different by using Labview 8.2 from Labview signal express?

Hello,
I am using a PCi-6281 to acquire a voltage. When I am using Labview signal express with only the step to acquire I read the good signal with the exact voltage. But when I am using my VI, the y axis and the values recorded are wrong. Why this difference appears?
I insert a picture with both signal: at the top is the signal from my vi (wrong measurement) and at the bottom is the signal from labview signal express (correct).
The vi I am using is the example Cont Acqu&Graph Voltage-To file (binary).vi.
Thank you for your answer!
Sophie
Sophie

I am using the binary file because it requires the minimum change in another VI. I have tried to change in scaled data but now my second VI has not enough memory to display all data.... What's wrong? Here is my second VI. Totest with data you need to insert a number in the "scaling factor" if not the dat are multiplied by zero...
thanks for your help!
Message Edité par stage84 le 07-24-2009 10:11 AM
Attachments:
Display 3.vi ‏1867 KB

Signal Express 2009 causing NIMAX to generate an Error Exception message

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