TDMS Postprocessing

Good Day,
I need your advices about this problem in TDMS Postprocessing:
At last i finished the "Phase data transfer" and i continued to the next phase, on execution of the activity "Res
Internal Header Tables After the Transfer" i get this error:
Phase 'Postprocessing' of activity_id 'Reset Internal Header Tables After the Transfer' differs from active phase 'Data Transfer' in package 90002
How to set manual the parameter or how to make this work =) ?
with best regards,
Anatolii

Hello,
I think there is some confusion. "Define mass transfer ID", "Run Database analysis", "Define conversion object" and "Generate conversion object" are the activities belong to the System Analysis phase but not Data transfer phase.
Are these activities successfully executed in the system analysis phase ?
what about the define mass transfer id ? is any exeuction completed successfully ?
Can you check again. Just verify that all the activities under system analysis and data transfer should have completed successfully. If its fine then you can change the phase as
guided by Rui above.
Best Regards
Niraj

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USB 6009 and TDMS write

Dear all!
I'm using USB-6009 device to adquire data from a physical channel. In the following vi, the number of samples to be adquired is set to 1000, with a 100Hz rate. Therefore, as I understand, the number of samples that should be read inside the while loop where DAQmx read is placed should be 10 for each iteration. However, I've tried to store this information in a TDMS file and I'm getting less number of samples as expected. I wouldn't like to lose any data.
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Attachments:
USB6009_TDMS.vi ‏25 KB

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Error reading TDMS file with inconsistend dt

Hello all,
I would like to ask your help to understand how to read a TDMS file which I am opening and closing based on a user input. As a result the data in the TDMS file does not have a consistent time step, which may be causing my problem, but I really don't know. I keep getting the error 2501, that I have an invalid reference.
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Attachments:
error-2501.JPG ‏198 KB

I think you open multiple times the same TDMS file, you should open it before the while loop. And I don't see a close tdms function...
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Ton
Message Edited by TonP on 02-14-2007 07:45 AM
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TS3775 Hi I am trying to connect my mba mid 2011 with an imac 27" 2011 with target display mode tdm. When I am using a thunderbolt cable nothing will work. When I use a minidisplay cable, both screens turn blue but eventually nothing happens. What is the

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You can use either one, but for your application, I would use the synchronous. It requires far less setup. When you open the file, set both enable asynchronous and disable buffering to FALSE to enable you to use synchronous with arbitrary data sizes.
Attached code is LabVIEW 2011.
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Attachments:
UpdateTDMS.zip ‏20 KB

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Guys,
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Edited by: Stefan Sinzig on Oct 3, 2011 4:57 AM

The reduction itself is not based on the date when the order was created but the logic enhances it to invoices and offers, basically the complete update process.
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Error 6 occurred at TDMS Open in TDMS

Hi,
I have a application that is using the TDMS VI's to generate a Logfile.
The application ran correctly for 12 days. (Each errors, and some parameters - every hours - was correctly written to my TDMS file).
Then, the following error occured :
Error 6 occurred at TDMS Open in TDMS - Write data SubVI V1.2.vi->D2XX MultiTester V1.5.vi
Possible reason(s):
LabVIEW: Generic file I/O error.
=========================
NI-488: I/O operation aborted.
I join my VI that manage the TDMS file.
The error seems to come from the VI "TDMS OPEN". The corresponding TDMS file is effectively at the specified path, and its content is OK (all expected infos are present). The file is called LogFile_0_1.TDMS.
Depending on the TDMS file size, the application automatically creates a new file. I tried to force that to get a new TDMS file (assuming that the active file was corrupted or blocked). A new TDMS file was created (LogFile_0_2.TDMS.) but only the first tab (root) was created. Then the same "Error 6 " was still present, exactly like before.
Do you think this problem can come from Windows?
Or does it come from my application? What is not optimal, is that this "TDMS - Write data SubVI V1.2.vi" is called about every second, and the "TDMS OPEN" function is called unconditionally (even if no modification on the TDMS file are needed).
How can we explain that this bug appears after about 12 days only?
I also join you the LogFile_0_1.TDMS that I converted to an Excel file, and the LogFile_0_2.TDMS that was not correctly created.
Thank you in advance for your support.
Michael
Solved!
Go to Solution.
Attachments:
LogFile_0_1.xlsx ‏560 KB

MarcoMauri wrote:
My guess is that you forgot to close the TDMS file and each time your VI is called a reference is created.
It could be that after a week the maximum possible number of references was reached, and you got the error.
Regards,
Marco
Marco,
That's not just a guess, that is a very real possibility. And lets not forget the memory leaks from not closing references.
ALWAYS close ANY references you create. If you open a reference to a file, make sure you close it.
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Newly written tdm/tdms file not found

Hi,
I am trying to save some simple thermocouple data to a tdm/tdms file. I run my vi and it seems to work just fine. I am using the NI 9213 getting started example as a basis and have added tdms open, tdms set properties, tdms write, and tdms close. I can see the data streaming on the waveform chart but when I hit stop and go look for the saved file I can't seem to find it. What am I doing wrong?
Thank you
Solved!
Go to Solution.

SRamirez wrote:
I set it to create. When I run it once for a new folder it runs just fine but if I try again I get error 6.
You are specifying a folder? You should be giving a full file path (like c:\temp\blah.tdms). What you might want to do is build a file name based on the data/time. This way you won't have to worry about overwriting files and what not.
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Attachments:
Build File Name.png ‏9 KB

How to compare signals from two different .tdms files?

i'm developing a lie detection system in labview.so inorder for that i need to compare the threshold physiological signals from the .tdms file with the signals i acquire continuelsy from the subject for each question asked.i use respiration monitor and heart beat monitor together with the sensorDAQ to acuire the physiological signals.so which are the function i should make use of?i have the following toolkits
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2. adaptive filter toolkit
3. digital filter design toolkit
4. biomedical toolkit
please give me advise on this.
thank you.
Solved!
Go to Solution.

Lie detector systems (polygraphs) generally work by looking at the physiological responses to the own subjects baseline, and do this in real-time. You could use a file that represents the stored "baseline" for the subject, but the overall environment, circumstances, general state of the subject, etc. may not be similar enough to easily see subtle changes.
From the stored file, you might determine a set of parameters or thresholds that indicate "normal, relaxed" for each signal. You could read the file into your LabVIEW program, process each channel, and save these parameters. Then when you have the new data, you can read the new data file in and process it in a similar way and then determine whether the parameters are outside the limits that you established for a "lie".
You may get more responses to this question if posted in the Biomedical User Group
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How do I select more then one channel to view in tdms file viewer graph panel

I have a TDMS file that I can view with the labview 2013 TDMS file viewer and I can select one signal out of 15 signals to view on the graph panel. however I would like be able to look at 2 or 3 signals
on the same graph but can't seem to be able to select more then one signal at a time. Is there a way to select more then one to view?

I've modified the TDMS viewer in the past to allow selecting multple channels. It's a little bit of a pain because the tree control in the viewer only allows you to select one item. You have to edit the tree to allow multiple items. Now your selection is an array instead of a scalar. This means the rest of the code has to be updated, and the references to the tree in subVIs need to be updated. Not impossible but it takes some time. Alternativly open it in Excel with the free add-in then you can select the two columns you want and insert a graph. Not as simple for the user but using Excel, which users should be familiar with might mean users need less training on data files.
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How does DIADEM import TDMS files? How gets every channel his number and groupindex? How can I determine which channel has which groupindex and number?

I store different channels in a TDMS file.
I like to have a time channel at the first position with group index 1 and number 1.
When I read the TDMS file with DIADEM the time channel (Float64) is on a differernt position, and the channels are not sorted alphabetically.
Here are my questions:
How does DIADEM import TDMS files?
How gets every channel his number and groupindex?
How can I determine which channel has which groupindex and number?
Best regards
Joerg

Hi Jörg,
i suppose that you´re programme whose create the *.tdms file is writing on false position. Try to create datas with timechannel on first indes in diadem, then save it and then open it again. you see that all is correct. So please tell me what programm in what version do you use and please attache it here.
Did you use the library for creating *.tdms files like in the link ?
http://zone.ni.com/devzone/cda/tut/p/id/6471
Here you find the gtdms_8.x.zip - when you extract it and opened the *.llb you find vi´s for all functions e.g. writing 2d array of strings to *.tdms file
when you open the subvi´s then you see how created and writing datas/structure to *.tdms files. Because *.tdms is binary you can´t see structure with open it in editor.
When you don´t have Labview you can use the 30 days test of current version 8.5 under following link
german version download link
https://lumen.ni.com/nicif/d/lveval/content.xhtml
english version download link
https://lumen.ni.com/nicif/us/lveval/content.xhtml
Hope it helps
Best Regards

TDMS Postprocessing

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