File plate TDM

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• Files reading TDMS problem in Labview 2010, created in 2009, error-2503

  I did my measurements on my laptop with Labview 2009 installed.

  The file format has been TDMS v1.0

  I can read these files with the TDMS files viewer and I am able to do analysis on my laptop.

  On my desk I have Labview 2010.

  If I run the vi in Labview 2010 analysis, I get the following-2503 error: specified file does not have the PDM file format standards.

  What's wrong?

  I can open the file in Excel with the add-in.

  I've included a tdms file created on my laptop in Labview 2009

  For this problem, it's a bug in LabVIEW 2010 (not in previous versions of LabVIEW), sorry for the inconvenience. While the side R & D to fix this problem, we also a workaround solution, but perhaps a little more complicated:

  (1) Please use older version of LabVIEW (like 2009 or 8.6) for defragement file by using the node TDMS defragment, if it works fine, you can then open it défragmentée TDMS in LabVIEW 2010.

  (2) if the PDM defragment returns an error, then you can always find your defragmened files in the temp directory of Windows, but under a different filename (randomly generated), you can type "%Temp%" Run windows to open your temporary file.

• How to read/write tdms 2.0 files with the TDM C DLL?

  Hello

  How to read/write tdms 2.0 files with the TDM C DLL?

  How consequently the datas in interlaced with the TDM C DLL mode?

  Thank you

  Confirmation: TDM C DLL always wrote the file in TDMS version 2.0.

• How to merge and write analog inputs, and export data to a tdms file?

  I have a vi who writes analog inputs in tdms files. I also want to write the analog output signals, which are 2d table entries in the same PDM file with additional columns representing the analog output signals. How can I get this feature?

  Ashaironix wrote:

  Hey Crossrulz,

  So you're saying that writing two files tdms with entries as HAVE and AO, will write everything in a file single tdms AOs and Ais?

  N ° you write in the same file, just different GROUPS.  TDMS is a hierarchical data format.  You have the file, group, channel.  Waveform data will actually in the channel data.  But you can have metadata on any level.  So, I do a group I and a group of the AO.

• nilibddc dll: opening files tdms with the corrupt index files

  Hello

  I have a question about the error handling when using the nilibddc.dll.

  I want to use nilibddc.dll to open the .tdms file. At the time I experimented with some error cases and got stuck in a case:

  When I try to open a file with a corrupted file .tdms_index .tdms I get code error-6211 (DDC_StorageCouldNotBeOpened).

  The file .tdms_index is corrupted due to errors during the copy of the file.

  The problem I've noticed is that I have a lock on the corrupted file .tdms_index file after DDC_OpenFile (...) (I can rename it, but I can't delete the file!).

  As you can see in the code snippet - it is not really special...

  int ddcError = 0, length;
  
  DDCFileHandle	file = 0;
  
  ddcError = DDC_OpenFile (file_path, NULL, &file);)
  Here, I get ddcError is-6211
  
  If (ddcError == 0)
  
  {
  
    do something with the file...
  ddcError = DDC_CloseFile (leader);
  If (ddcError == 0)
  
    {
  
      < "no="" error="" -="" everything="" done"=""><>
  
    }
  
  }
  System ("pause");

  I miss something here? Should I use DDC_FreeMemory in somehow to free open handles?

  I also tried to use the DDC_OpenFileEx (...) with readOnly set to true. But that doesn't change anything!

  Thanks in advance for the help,

  Daniel

  You are right. The sample file you attached to your message causes an access violation. If no normal flow program and apllication in undefined state.

  I will direct the file to developers. I tried to generate a file that causes the same by beating some index files, but has failed to create one on my own. It happened to your site more than once?

  What can we do?

  In the first place, simply copy the PDM. The index file will be recreated when the file is accessed. What is lost when the index file is not copied, therefore the time required to create the index file by scanning once the PDM file.

  I hope this helps a little

  Andreas

• Can I save a TDM file without its TDX data?

  I have hundreds of data files that have been sorted (by date).  In some cases, I want to analyze subsets of these data in specific groups.  I would like to save these groupings in a TOC file, but I don't want another copy of the data block.  However, I notice that if I record a TDM, it automatically records the TDX and I'm not sure that it is possible to save/open a TDM without its same name TDX file.  Someone else has a similar need and/or to know a method of data management that may be suitable for my needs?

  Thank you.

  Although there are technical ways such as Brad described it is built directly into the mechanism to implement your use case.

  What you can try to do (if possible) use datafinder to define your new file as a query and load the results of the query instead of a file of tdm.

  • Find a query that contains contains the strings that you want to load it:
    for example, channels where channel.name is channel.name root.creationdate or 'abc' and 'def' is...
  
  
  • Load the result of the query in the data portal
  
  
  • You can save these queries as tdq and those file that allows you to set your content of the resulting file/portal of the tdm

  The result is almost equal, because if you delete files tdm you assembled tdm file would be invalid and the query would return fewer channels.

• Extract strings in the tdms files and write the strings in the file txt or lvm

  Hi all

  I'm struggling to extract strings from a file of tdms to write them in a txt file.

  The strings were written in tdms is a time stamp data recorded to a compact RIO.

  I put the chain in a different group from the PDM, but when I use the function read tdms with the group name, as I said, an error message is always take place.

  Thanks for all the help.

  PS: I have attached an example of tdms file I got over here.

  Kind regards

  Yifeng

  I tried your attached file and it seems that everything goes file. I have attached the screenshot of my VI here, what do you want?

  

• The decisive TDMS file size when running.

  I have a request where the .tdms file can grow very quickly, due to the amount of stored data - 7 channels of data acquisition in 50 000 samples dry.

  I want to determine when the file has reached about 2 GB and close the .tdms file and create a new one with a different/timestamp name.  I want to break these files due to portability problems.

  It is, how to determine the size of the .tdms file?  When I try to give the Sub - VI "to get the size of the file" the .tdms, a GPIB controller file path must be in error of the charge occurs.  Also, the refnum of the tdms file is not the same as the file refnums, so the Subvi "get file pointer" will not accept the PDM refnums.

  I could probably calculate somehow what is happening in the PDM file, but that seems to be a workaround and will not exact due to the header information.

  You can't get the size directly from the refnum file, but you can probably still get the size another way. Use the file/directory information of the pallet of Advanced File i/o. It takes a path as input, not a refnum. This should give a specific semi file size value, although it will be possible that there is data to cache that has not yet been emptied to the file. Yet, when you talk about the file sizes in the range of 2 GB, it should be close.

  It is roughly the same thing that I look in Windows Explorer as the TDMS file size expands as it is written.

• new components written in tdm/PDM file not found

  Hello

  I try to record some simple thermocouple data in a file of tdm/PDM.  I run my vi and it seems to work perfectly. I use the example started get NEITHER 9213 as base and added tdms open, PDM defined properties, PDM write, and PDM closes.  I can see the data in streaming on the waveform table, but when I hit stop and pick up the saved file I can't find it.  What I am doing wrong?

  Thank you

  
  

• TDMS convert - to-file with the same name TXT

  Hey,.

  I'm working on a VI to convert my data PDM in TXT. My original file is large enough, so I first use a VI to split this file into smaller TDMS files of a few hundert. I found a beautiful VI to run the online task that I adapted a bit (see TDMS to TXT Converter.vi), for example, I added a timer function to give a precise departure time. The problem, I am now face, is that the program does not address TDMS files in order while the TXT file numbers are given successively - so I can't assign the TXT files for TDMS files. I tried to extract the TDMS file names and use them to name the output TXT files, but I don't know how the data type to overcome conflicts (see TDMS to TXT Converter_Version.vi). You have any ideas on how to solve this problem?

  It is useless to the folder in the list where you do the the file path for the text file.  You already have the file that you want to place the data and the appropriate file name.  Just so use the path to build and wire the result in the file Create/replace.

• Viewer files TDMS file not found

  The VI I use currently is a slight modification of the example ContAcq & GraphVolt.  I've recently updated to LabVIEW 2009, and my Viewer TDMS open more TDMS files I record.  The files are there and I can open them using the example of ReadTDMS VI, but the viewer in my block diagram gives me 7 error: file not found.  There is a caveat, however.  If I save on a file that I had previously created, the file is located in the Viewer.  So if I save the file test1.tdms, the first time, it displays an error found the file, but the second time I save the viewer test1.tdms the file is located.  Any ideas as to why this is happening?

  Since my VI is close enough to the ContAcq & GraphVolt example (which does not work at the moment), this VI troubleshooting to solve my problem.

  
  

• Read error-getdatatype TDMS

  Brief history on my project.  I have a PXI system configuration to read signals from DSA devices, Series S, and an encoder.  I use matlab to make calls to functions in libraries NI DAQmx and nilibddc.h.  I collect the data and the flow of data on the disk with the ability to view data during the acquisition.  Acquisition occurs for almost a minute plus 37 channels to 100ksamp/sec.  So the. TDMS files are quite large.  I synchronize my systems by some sort of configuration of the hybrid master slave device.  I use auto-sync in all types of similar devices, and to synchronize the different types of devices, I use the sample clock and start to trigger a DSA device to synchronize my other devices.  Since I use the automatic synchronization of the. TDMS files can have anywhere between 1 or 20 channels in a single file.  This makes a very large file and Microsoft Excel import does not cut because of the limitation on the size and the time it takes to load.  So I use the nilibddc.dll to read data from files which seems to be fairly smooth so far. I did not attempt to read a file with a minute of a data value but the worst case I can read the data file chunks at a time so I'm not terribly worried about it.  My problem occurs when I read my file data .tdms containing my encoder data.

  The part where it inhibits is is my function calling for DDC_GetDataType.  Now when I use my code to read data from the analog .tdms file it works well and does what I want it.  The error I get for my counter of the signals is an error unexpectedly (-6204.)  Now what is interesting is when I use labview 2009 on another computer, I can read the files without a problem.  I'm guessing that my labview 2009 uses different libraries however.  For example, when I read the file in labview, I go to the range of functions, choose file/o, PDM in streaming and use either read the .tdms or PDM Viewer function.  When I'm on my main computer, I use a call to the DIAdem connectivity library, that I downloaded from OR. Microsoft excel importer also seems to be hung in the same place (getdatatype).  I found this to inspect the log file, it creates when I try to read it.  Any help would be appreciated.  I have attached the error log I get the .tdms microsoft importer.  I've also attached a sample file .tdms with the position of encoder in it data.  If trying to open outside of labview, don't be fooled if she tells you that there is no data available.  It is, by using labview 2009, you can read all the 500ksamps without problem.  Using PDM viewer or reading tdms atleast.  Thank you.

  Hello-

  I wanted to preface what follows with the fact that I assume that you are using the TDM C DLL downloaded here.  If this is the case, the following should solve things for you - if not, please let me know where you got the ddc library of.

  Unfortunately, the TDMS dll which is downloaded from the link above is a little outdated and contains the bug you reported.  I created an internal action query to update the download with the version the most recent available to us.  In the meantime, I have attached the tdms dll needed to solve the problem for you.  You should not use the attached dll to replace the dll in ".\Dominonilibddc\dev\bin\\tdms_ebd.dll".

  A potential problem here is if you use the merge modules included to redistribute your product.  If you are, we will need to get some updated modules as well merge - please let me know if this is the case for you and what is the level of urgency.

  Please let me know if this does resolve the problem for you.

  Thank you-

  NickB

  National Instruments

• File from an executable of LabVIEW PDM

  Hey, I am writing a program that measures a bunch of stuff and saves to a TDMS file (as it is by far the easiest method and fast, I found). I was wondering, once that my program is converted into an executable, files are still viewable TDMS in Excel/OpenOffice, or viewing requires NI Diadem. Computers, on which the executables will run will not necessarily installed LabVIEW.
  I would like to try myself, but let us, I am not worthy of a developers license...
  Thanks in advance
  Doug

  "are the PDM lines visible in Excel/OpenOffice?

  Yes! the format of a file *. TDMS files do not change between the development environment and an application built.

  That being said, the imported PDM of addon for Excel automatically installs with the LabVIEW development system and may not already be on target when you deploy your executable.  Do not fear however! the addon TDMS for Excel is FREE and available for download here

• With the help of C TDMS API DLL

  
  

  CT: 2 file format. XML header (*.tdm) + queue (*.tdx) binary

  PDM: 1 file format (*.tdms) + optional index file that is recreated if deleted.

  You also copied the DataModles file or only DLLs?

  You can run the examples included?

  Greetings

  Andreas

• write the size of measurement files

  Hello

  I save a lot of data in my controller and you want to write to a file measure tdms format.

  the problem is that the files are very large, if I use the "write to file measure" - on purpose - vi.

  If I use the 'writing TDMS' - function instead, the files are much smaller, with almost the same parameters.

  Is it possible to use the Express VI with the same efficiency, if I used the "writing TDMS" - function?

  Why are large files if I have the express vi?

  In general, avoid using express screws they tend to be just something you can put down and quickly have something that will work.  They also tend to be inefficient.  In the case of write it to a file as it opens and closes the file whenever you call.  With PDM, which causes a lot of overhead in the file.  If you were doing a Defrag TDMS on each of your two files, it should come out pretty much the same size.