writing files binairy

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• write 1 d digital table in a binary file and start a new line or insert a separator for each loop writing file

  Hello:

  I'm fighting with digital table of 1 d writeing in a binary file and start a new line or insert a separator for each loop writing file. So for each loop, it runs, LABVIEW code will collect a table 1 d with 253 pieces of a spectrometer. When I write these tables in the binay file and the following stack just after the previous table (I used MATLAB read binary file). However whenever if there is missing data point, the entire table is shifted. So I would save that table 1-d to N - D array and N is how many times the loop executes.

  I'm not very familiar with how write binary IO files works? Can anyone help figure this? I tried to use the file position, but this feature is only for writing string to Bodet. But I really want to write 1 d digital table in N - D array. How can I do that.

  Thanks in advance

  lawsberry_pi wrote:

  So, how can I not do the addition of a length at the beginning of each entry? Is it possible to do?

  On top of the binary file write is a Boolean entry called ' Prepend/chain on size table (T) '.  It is default to TRUE.  Set it to false.

  Also, be aware that Matlab like Little Endian in LabVIEW by default Big Endian.  If you probably set your "endianness" on writing binary file as well.

• can anyone help, my windows media player says is writing files on cd/dvd, but it comes out as white

  Hi people says its writing files to the disc, but when I put back it in the laptop or another player yet to come sound like a blank disc, tried a lot of different cd/dvd discs

  Hello

  ·        You did changes to the computer before the show?

  ·        You receive an error message or code?

  Method 1: I suggest you follow the instructions in the link and check if this may help:

  http://Windows.Microsoft.com/en-us/Windows-Vista/burn-a-CD-or-DVD-in-Windows-Media-Player-frequently-asked-questions

  Method 2: You can also try to change the settings for burning a CD/DVD and check if it helps:

  http://Windows.Microsoft.com/en-us/Windows-Vista/change-settings-for-burning-a-CD-or-DVD-in-Windows-Media-Player

  Note: reduce speed before burning the data and then check if it helps.

• ORA-29285: error writing file

  Hi, I'm trying to clear a table in a flat file, & provided the stored procedure using my Tom Kyte @ https://asktom.oracle.com/pls/asktom/f?p=100:11:0:NO:P11_QUESTION_ID:88212348059.

  It worked well at first, but now I always get the following error message:

  ERROR on line 1:

  ORA-29285: error writing file

  ORA-06512: at "OFSA_ATOMIC. DUMP_TAB_TO_CSV", line 45

  ORA-06512: at line 1

  The search for this error ORA out Virgin on MOS.

  Any ideas how to solve this problem?

  I already checked for space on the file system and there is lots of space available.

  Also, the file is created with a size of 0 bytes before the procedure was abandoned.

  Thank you

  -CV

  Hello

  trying to figure out what has changed since it worked. Length of the line would be greater than 1024 default that uses Tom proc?

  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e40758/u_file.htm#ARPLS70900

  The FOPEN max_linesize parameter must be a number in the range 1 to 32 767. If not specified, Oracle provides a default value of 1024.

• Exception is coming when writing files on FTP through business services

  Hello

  Exception is coming when writing files on FTP through business services

  I write file on the FTP of Business Service Oracle Service Bus. The file was written successfully, but in the following exception logs is coming. Is there a solution to remove this exception. or why when you rename the file there.

  < 28 August 2014 9:49:29 AM GMT + 05:00 > < error > < WliSbTransports > < BEA-381105 > < error occurred for the service endpoint: com.bea.wli.sb.transports.TransportException: file could not be renamed to: TESTFILE/TEST.a to: TESTFILE/TEST

  com.bea.wli.sb.transports.TransportException: file could not be renamed to: TESTFILE/TEST.a to: TESTFILE/TEST

  at com.bea.wli.sb.transports.ftp.connector.FTPTransportProvider.sendMessage(FTPTransportProvider.java:422)

  at com.bea.wli.sb.transports.ftp.connector.FTPTransportProvider.sendMessageAsync(FTPTransportProvider.java:306)

  at sun.reflect.GeneratedMethodAccessor672.invoke (unknown Source)

  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

  at java.lang.reflect.Method.invoke(Method.java:597)

  Truncated. check the log file full stacktrace

  Caused by: java.io.IOException: file could not be renamed to: TESTFILE/TEST.a to: TESTFILE/TEST

  at com.bea.wli.sb.transports.ftp.resource.FTPResource.renameToUniqueFilePath(FTPResource.java:1962)

  at com.bea.wli.sb.transports.ftp.connector.FTPTransportProvider.sendMessage(FTPTransportProvider.java:415)

  at com.bea.wli.sb.transports.ftp.connector.FTPTransportProvider.sendMessageAsync(FTPTransportProvider.java:306)

  at sun.reflect.GeneratedMethodAccessor672.invoke (unknown Source)

  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

  Truncated. check the log file full stacktrace

  Kind regards

  Junaid Ahmed

  Yes, read/write access is available. but when I send the name of the file TEST. A there is no Exception. OSB is 11.1.1.6.0 and I do FTP OSB business for iSeries. I don't know what will be the reason.

• unexpected empty cells in the worksheet after writing file

  I'm writing dummy data to the excel file and notice that there are blanks in the file as below. How I avoid this?

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  10:10:07	10	0	1	2	3	4
  10:10:07	20	0	1	2	3	4
  10:10:07	30	0	1	2	3	4
  10:10:07	40	0	1	2	3	4
  10:10:07	50	0	1	2	3	4

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  10:10:07	10	0	1	2	3	4
  10:10:07	20	0	1	2	3	4
  10:10:07	30	0	1	2	3	4
  10:10:07	40	0	1	2	3	4
  10:10:07	50	0	1	2	3	4

  Did you do that?

  

• Time loop writing file of Rio - please help

  Hello world

  I'm writing the data collected on the 32 channels of a module 9205 to memory on board a Rio-9074.  This isn't the final requirement of the application, but this is the first simple step.  Both the FPGA Vi and Vi of the host are attached to this post.

  Writing to the file produced inside the while loop, so that the outside while segments of loop files from time to time (this segmentation is a requirement of our application).  I have attached a sample file of release in this post as well (the output file opens in wordpad).

  In the output file, the second and the third column is a timestamp with fractional seconds.  The lead time is 5 Hz, but if you see the first lines in the output file, you will notice that it sometimes jumps an iteration of the loop - the timestamp, from 0.6 s to 1 s instead of s 0.6 to 0.8 s.  This occurs regularly throughout the file.  No idea if this due to a physical limitation of the hardware, or the clock, or if it's because of something in my program?  If you could please take a look at my program and help me optimize my screws or give me suggestions on why this delay occurs, I would really appreciate it.  Please let me know if you have other questions too, and I will answer them immediately.  Thank you!

  P.S - Writing on an SD card on a 9802 using these programs also causes the same problem.

  Good afternoon Derrick.

  The following link describes the RT FIFO that I mentioned in my previous post.  It is the method you want to follow to get the data from your host RT to your PC so that you can save data to the PC.  It is a method of choice (when it is an option) because of the increased storage capacity of a PC (in general) and the requirement of transformation to write in the file on the host of the RT.

  FIFO in real-time for deterministic data transfer screws

  http://zone.NI.com/DevZone/CDA/tut/p/ID/3934

  Alternatively, you can use something more similar to the example of "RT FIFO Communication.lvproj", found by searching FIFO in the Finder for example of NOR, to log on to the host of the RT.  Remember that you want to change this example; you don't want to write to the file in a timed loop because your hard drive / memory flash access is not deterministic.

• simultaneous reading and writing files TDMS

  A customer had a program written in 8.6; the programmer is no longer available and I'm looking to debug intermittent problems.

  N - channels of data is acquired and streamed to a PDM file. The operator can select a channel to view data in real time, but the display is one scope table displaying 15 seconds worth of data and when switching of channels the program "returns" display with the last 15 seconds of a data value of the new string (barrier data extracted from the TDMS file).

  What I notice here, aside from using sloppy cluster error, is that both references are open in the file - one for writing data and the other for recovery data. Is this a good practice? is it necessary or one reference supports the reading and writing? Is this a possible source of problems?

  

  thanx

  lmd2

  You can do the same thing with a single file reference.

  The issue of not being able to see the data that was written after the reading of reference has been opened is known for having refnums to open in two different processes, but not in the same executable or VI.

  Herbert

• vCO and reading/writing files

  Hello community,

  I am a newbie with vCO, sorry for the basic question perhaps.

  I created a "workflow" for automatic deployment and customization of VMs. job well enough, the model is cloned, sysprep, vCPUs and RAM set and so one. But the final customization tasks is to assign a unique IP address that is in a list in a plain text file. vCO should open the file, take the first IP address in the first line, remove it and close the file (DHCP is not an option). I can open and read the file with the options of '.readall' and a 'player', but which is not exactly what I want. I tried a few '.readline' which translates as "cannot find function readline" and after I I thought to split the entire string that resulted in "no defined split." I really don't know if this is the right way.

  Can someone please guide me in the right direction, perhaps with a few code snippets?

  Thank you very much!

  S.

  OK, here's another example, which reads the entire file into a string, and then use split() for areas exploded in the elements of an array:

  var fr = new FileReader("C://vcoscripts/demo.txt");
  fr.open();
  
  var complete = fr.readAll();
  System.debug("complete: " + complete);
  var lines = new Array();
  lines= complete.split(/\r\n|\r|\n/);
  System.debug("lines: " + lines);
  for (var linenr in lines) {
      var currentLine = lines[linenr];
      System.debug("currentLine: " + currentLine);
      }
  

  With this, you can use methods of standard table (push(), pop()), which might be easier to use.

  The regular expression to split the lines that I got:

  http://StackOverflow.com/questions/1155678/JavaScript-string-newline-character

  (good reading...)

  Edit: I forgot: with Array.strip (), you can remove an element of a table (in your case the IP address used before writing it back to deposit via FileWriter...)

  Kind regards

  Joerg

• Writing file case structure while loop?

  I would like to have a button on the front panel which indicates to start streaming data recording or not.  If the user does not press a button, no data is saved, and the façade works only as a display of data.

  I have now does not correctly.  The button is a while loop that is attached to a matter outside the loop structure.  I would like to a false statement to not save data to any file, but I needed to wire my knots of structure dealing with something, so the T and F are currently the same action (sort of).  How do I wire this configuration correctly please?

  Thank you!

  
  

• Formats of sound by using "his writing file.vi.

  This question applies to "Sound File Write.vi" and the reading part, too.
   
  This vi is ready to write sound waveforms where data DBL ranging from-1 to 1.
  In vi, there is provision to convert more formats such as I8, I16, etc. (_ArrWfmsToData.vi), but they do not operate properly, probably because a specific type code (10 to DBL) should be selected for other formats.
   
  The question is: what is the way to use other formats in addition by default in DBL?
   
  Best regards.
  Alipio

  What version are you using. If you use a Labview 8.0 or higher. You can right click on the VI and select the type to use as input. The default value is atumatic.

  Hope this helps

• Report writing file spreadsheet using Excel

  I did up a VI that writes all my 7 entries and column headers to a file of Excel csv for my report. However, most of the data values and the column headers from my Excel file is all packed together in 1 cell. How each value and header occupy only 1 cell of each?

  Your 'report' file is illformatted.

  You call "csv" which means "comma separated values". This file format requires that columns be separated using a «,» Therefore, the decimal point must be a '.'. It is a common ASCII text file format for values measured in U.S. regions.

  In Europe, the equivalent file format is a spreadsheet with tab as a separator of columns (which you have in your csv). This gives the user the ability to use '.' OR ',' as the decimal separator (regional dependence).

  Excel has filters for specific file formats import. As far as I know, the csv is a format file where such a filter is pre-defined... so he's looking for the file ',' as the delimiter column. Your file contains no...

  Norbert

• How to increase the frequency of sampling of several sensors via RS - 485 and writing files of measure?

  I have a vi that:

  -Locate the USB port that RS485 communication device is connected

  -sends a command to each sensor

  -reads a response from each sensor

  -performs a calculation on the answer

  -saves the response to a file of measure

  I used a flat sequence to query each sensor.  I am trying to find a way to modify this vi in order to increase the frequency of sampling on the sensors.  Currently, it takes 2000ms for question 4 sensors and write tot the measures file.  Anyone have any ideas on how to speed up by programming?  I am concsidering on the purchase of a device USB DAQ (USB6000) and rewriting of the vi.  I was wondering if there was some tweek I caould make on the vi.

  Thank you!

  I meant put the time-out on the line, then the reading will be either timeout after 200ms or read the 2 bytes.  Whichever is faster.  Then deletes this 200ms waiting you.  I have attached your vi to show you what I wanted.  I did not notice that it is a hardware or wither then you might want to look in the data acquisition functions.  It will clean up your code and are very easy to use.

• reading / writing file of computer network

  HelloW!

  I have to read pc specific network, save/display the path file and then write back the file I've already read, and then after confirmation that the file written is correct I have proceed please guide me steps in order to achieve this... Although this is a very basic question, but I ask you to start as I've never used before network with cvi. Please provide us with some examples of code if possible

  Thanks in advance

  A lot depends on how you get the path to the original remote file.

  If the process starts with the operator interactively by selecting the file (for example with FileSelectPopupEx), you can simply use the path returned by the function and process the remote file somehow on your PC.

• Ask for instructions to writing files music .mp3 download the server applications.

  Hello everyone.

  I need instructions on how to write applications for download music files .mp3 from the server and saved in the device memory. I would like to know which class should I use?

  Thank you

  MAZ

  A code example in this article which may help.

  http://supportforums.BlackBerry.com/T5/Java-development/download-large-files-using-the-BlackBerry-mo...